AsSalam Aklaikum.

Can sombody throw daleels for "is it necessary to wear cap/hat/imama during salat?"

as in india hanafi school of thought req one sgould wear cap else salah is not accepted.

Question:
Is it permissible for the imaam to lead the people in prayer with his head uncovered?

Answer:
Yes, it is permissible to pray with one’s head uncovered, but it is better to cover it, because that is more decent. One should also cover one's shoulders, according to the madhhab of Imaam Ahmad, because the Prophet (peace and blessings of Allaah be upon him) said: “No one of you should pray in a single garment with nothing of it covering his shoulders.” (Narrated by al-Bukhaari, 1/498; Muslim, no. 516).


Fataawa Samaahat al-Shaykh ‘Abd-Allaah ibn Humayd, p. 77

even though i dont understand the point of having this post in the thread, question itself has so many mistakes but since you've brought it let me clarify your confusion or misconception. there is no such fatwa by hanafi scholar be in pakistan or india or turkey or aghanistan etc where hanafi madhab is dominant that topi (cap) is compulsory in salaah. it is sunnah, and having said that, sunnah is encouraged to be applied in muslim life and not to be discouraged after saying that it is sunnah. thats whay all ahle sunnah scholars emphasize to cover up their head all the time esp. in salaah when person is actually talking to Allah SWT, more adab and preparation is required and be practiced.

here is the fatwa from askimam.org fatwa site about topi.



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It is not Waajib to wear a Topi. It is Sunnah. A Muslim male should wear the Topi at all times. If he unfortunately does not do so, then he should at least respect the Salaat and put on a Topi for Salaat. Your friend's claim is incorrect. (Refer below) and Allah Ta'ala Knows Best
Moulana Imraan Vawda FATWA DEPT.
CHECKED AND APPROVED CORRECT: Mufti Ebrahim Desai

Abu Kabsha (Radhiallaahu Ánhu) narrates that the hats of the companions of Rasulullah (Sallallaahu Alayhi Wasallam) used to be round and spacious. (Mirqaat vol.8 pg.246)

It is narrated by Tabrani on the authority of Ibn Umar (Radhiallaahu Ánhuma) that Rasulullah (Sallallaahu Alayhi Wasallam) used to wear a white hat. (Ibid)

Hassan Basri (Rahmatullah Alayhi) states that the people (Sahaaba - Radhiallaahu Anhum) used to make Sajda (prostrate) upon their turbans and hats. (Bukhari vol.1 pg.56; Rashidiyya)

Mullah Ali Qari (Rahmatulah Alayhi) states that the wearing of the hat has become one of the salient symbols of Islam. (Mirqaat vol.8 pg.246) It is the only outward and unique salient feature that distinguishes a Muslim from a non-Muslim. No other community group or people wear the Muslim type hat.


Source

There are many Ahaadith in support of the Topi (hat). Just as other Sunnats are to be followed at all times, similarly the topi should be worn at all times.

Special care should, however, be given to covering the head when performing Salaat and when answering the call of nature. Hereunder are a few Ahaadith regarding the Topi of Nabi (Sallallaahu Alayhi Wasallam):

1. Aaisha (Radhiallaahu Anha) mentions that when on journey, Nabi (Sallallaahu Alayhi Wasallam) would wear a Topi with ear-flaps. While at home, he would wear a Syrian Topi. (Akhlaaqun-Nabi pg.104) 2. Ibn Umar (Radhiallaahu Anhu) says, Nabi (Sallallaahu Alayhi Wasallam) would wear a white Topi. (Tabrani; Majma-uz-zawaaid vol.5 pg.21) 3. Habib ibn Salih (Radhiallaahu Anhu) narrates that when Nabi (Sallallaahu Alayhi Wasallam) would enter the toilet, he wore shoes and covered his head. (Bayhaqi vol.1 pg.96)

4. Waail ibn Hujr (Radhiallaahu Anhu) mentions that he performed Salaat with Nabi (Sallallaahu Alayhi Wasallam) and the Sahaaba (Radhiallaahu Anhum) who were wearing barnases (a type of topi or garment with a hood). (ibn Khuzayma pg.233)



Source

jazak Allah khayr.

Interesting, I've been to various Hanafi Mosques and I have yet to hear it as a requirement. I do see some brothers wearing them and some not.

As for the salah not being accepted, where did you get that from?