Asalaamu Alaikum,
It would be completely wrong and contrary to Islam to say that a man who oppresses his wife is "sinless" (ie. not attaining sin from it). You don't really need a hadith specifically to say this, because it's common sense (Not saying there aren't any though, as there's many which speak of oppression and how they'll go to hell for it). Hadiths/verses of the Qur'an wouldn't constantly talk about good treatment of women, if the opposite wasn't considered sinful. Also, no woman should stay with a oppressive husband.
I do remember a hadith about a man being asked about his family on the day of judgement (ie. how he handled them). It's to do with people being asked how they handled their responsibilities. There's also another hadith (though I need to double check source) of treating women (or it's daughters) well, as it is a curtain for them in the hell fire.
Anyways, here's
some hadiths/verses that indicate the kind treatment of women;
"Live together with them (wives) in kindness..." (Qur'an 4:19)
Umar(رضي الله عنه)
: “By Allah, we didn’t use to think that women had anything until Allah revealed about them what He revealed in the Qur’an, and distributed to them what He distributed…” [Bukhari & Muslim]
It was narrated that a man consulted ‘Umar ibn Al-Khattab, may God be pleased with him, about divorcing his wife and ‘Umar said to him:
“Do not do so.”
“I do not love her,” the man argued.
‘Umar may Allah be pleased with him said, “Are families built only on love? Where is, then, mutual care and the maintenance of rights and duties?”
[Fi Thilaal Al-Quranby Sayyid Qutb] (note: I've checked, this hadith is authentic)
During the time of Umar ibn Al-Khattaab (رضي الله عنه), a man said to his wife:
"I beg you in the name of Allah, do you love me?" She replied:
"No." When this news reached Umar, he summoned her and asked:
"Did you tell your husband that you do not love him?" She said:
"O Leader of the Believers, he asked me in the name of Allah so how could I lie to him?" He replied:
"Yes, you should have lied to him. Not all marriages are built upon love, rather people should establish their relationships upon Islam and good treatment of one another." (Ghidha' al-Albaab fi Sharh Manzoomah al-Adaab)
Iyas ibn 'Abdullah ibn Abi Dhubab reported... that The Messenger of Allah, may Allah bless him and grant him peace, said,
"The people of the household of Muhammad have surrounded by many women who are complaining about their husbands. Those men are not among the best of you." [Abu Dawud]
Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said,
"A believing man should not hate a believing woman. If he dislikes something in her character, he should be pleased with some other * or another* trait of hers." [Muslim]
Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said,
"Treat women well. Woman was created from a rib. The most crooked part of the rib is the top part. If you try to straighten it, you will break it. If you leave it, it remains crooked. So treat women well." [Agreed upon]
“The best amongst yourselves are the best to their wives, and I am the best to my wives.” [Ibn Majah]
It was narrated that Abu Hurayrah (may Allah be pleased with him) said: The Messenger of Allah (blessings and peace of Allah be upon him) said:
“May Allah have mercy on a man who gets up at night and prays, and he wakes up his wife, and if she refuses (to get up) he sprinkles water in her face. And may Allah have mercy on a woman who gets up at night and prays, and she wakes up her husband, and if he refuses (to get up) she sprinkles water in his face.”
[Narrated by Abu Dawood, 1308; classed as saheeh by al-Albaani in Saheeh Abi Dawood]
The eleventh one said,
“My husband is Abu Zar and what is Abu Zar (i.e., what should I say about him)? He has given me many ornaments and my ears are heavily loaded with them and my arms have become fat (i.e., I have become fat). And he has pleased me, and I have become so happy that I feel proud of myself. He found me with my family who were mere owners of sheep and living in poverty, and brought me to a respected family having horses and camels and threshing and purifying grain. Whatever I say, he does not rebuke or insult me. When I sleep, I sleep till late in the morning, and when I drink water (or milk), I drink my fill.”
….’Aisha then said: Allah’s Apostle said to me,
“I am to you as Abu Zar was to his wife Um Zar."
- [Hadith - Sahih Al-Bukhari 7.117]
"Thawban reported that when the revelation came in regard to gold and silver (9:34-5), the sahabah wondered,
"What kind of wealth should we then keep?" AndUmar (ra) said
"I will find the answer to that."
He then rode his camel fast until he caught up with Allah's messenger (saw) and he - Thawban - was right behind him. He asked
"Oh Allah's messenger! What kind of wealth should we keep" and the prophet (saw) replied;
Let each of you keep a heart that is grateful (to Allah), a tongue that remembers and mentions Allah, and a believing wife who would assist him in regards to the affairs of the hereafter." (Ibn Majah)
Once, the Prophet (صلى الله عليه وسلم) went for Hajj with his wives. However, his wife Safiyyah (رضي الله عنها) began to weep because her camel was weak and was slowing everyone down. The Prophet (صلى الله عليه وسلم) noticed that she was upset and immediately went to her. He comforted her, and wiped away her tears of sorrow with his own blessed hands and asked her to stop crying. (Majma' Al-Zawaa'id)
The Prophet (صلى الله عليه وسلم) said:
"When a husband and wife look at one another (with love), Allah looks at them both with mercy. And if the husband then takes hold of his wife's hand, their sins will fall from their fingers."(al-Jaami' al-Sagheer lil-Suyooti)
The Prophet (صلى الله عليه وسلم) said:
I urge you to treat women well. (Bukhari)
Aa'isha (ﺭﺿﻲ ﺍﻟﻠﻪ ﻋﻨﻬﺎ) narrated that
the Prophet (صلى الله عليه وسلم) used to stitch his own clothes, milk the goats and helped with the household chores. (Bukhari)
‘Aa’ishah (ﺭﺿﻲ ﺍﻟﻠﻪ ﻋﻨﻬﺎ) prepared a dish called khazeerah and presented it to Sawdaa’ (ﺭﺿﻲ ﺍﻟﻠﻪ ﻋﻨﻬﺎ), but she refused to try it. So ‘Aa’ishah said:
“You are going to eat it, otherwise I am going to wipe it on your face!” Sawdaa’ still refused, so ‘Aa’ishah scooped some of the dish into her hand and smeared it all over Sawdaa’s face. The Prophet (صلى الله عليه وسلم) said to Sawdaa’:
“(Don’t let her get away with it!) Wipe her face with it too!” So she did and the Prophet began to laugh
. (al-Silsilah al-Saheehah)
Lol, one of my favourites.
Aishah (رضي الله عنها), the beloved wife of the Prophet (صلى الله عليه وسلم) said:
"Not once did the Messenger of Allah ever hit a woman." (Abu Dawood)
And of course, there's many other hadiths, not to mention the sayings and actions of the Salaaf. Hope you see the point that, any Muslim who actually learns about their religion, would know that oppressing or ill-treating their wives is considered sinful. And that throughout the sayings and actions of the Prophet, it is made clear how men in Islam should treat women.
ps. Some of these hadith above are rare gems, so wish to give a brother named ayub57 credit for sharing some of these