Click>> by Ibn Kathir:
Sahih Al-Bukhari records that when Ibn `Abbas was question about this matter, he said that the earth was created before heaven, and the earth was spread out only after the creation of the heaven. Several Tafsir scholars of old and recent times also said similarly, as we have elaborated on in the Tafsir of Surat An-Nazi`at (chapter 79). The result of that discussion is that the word Daha (translated above as "spread'') is mentioned and explained in Allah's statement,
وَالاٌّرْضَ بَعْدَ ذَلِكَ دَحَـهَا - أَخْرَجَ مِنْهَا مَآءَهَا وَمَرْعَـهَا - وَالْجِبَالَ أَرْسَـهَا
(And the earth, after that, He spread it out. And brought forth therefrom its water and its pasture. And the mountains He has fixed firmly.) (79:30-32)
Therefore, Daha means that the earth's treasures were brought to its surface after finishing the job of creating whatever will reside on earth and heaven. When the earth became Daha, the water burst out to its surface and the various types, colors, shapes and kinds of plants grew. The stars started rotating along with the planets that rotate around them. And Allah knows best.
وَإِذْ قَالَ رَبُّكَ لِلْمَلَـئِكَةِ إِنِّي جَاعِلٌ فِى الأَرْضِ خَلِيفَةً قَالُواْ أَتَجْعَلُ فِيهَا مَن يُفْسِدُ فِيهَا وَيَسْفِكُ الدِّمَآءَ وَنَحْنُ نُسَبِّحُ بِحَمْدِكَ وَنُقَدِّسُ لَكَ قَالَ إِنِّي أَعْلَمُ مَا لاَ تَعْلَمُونَ
(30. And (remember) when your Lord said to the angels: "Verily, I am going to place (mankind) generations after generations on earth.'' They said: "Will You place therein those who will make mischief therein and shed blood, ـ while we glorify You with praises and thanks and sanctify You.'' He (Allah) said: "I know that which you do not know.'')
Al-Qurtubi, as well as other scholars, said that this Ayah (2:30) proves the obligation of appointing a Khalifah to pass judgements on matters of dispute between people, to aid the oppressed against the oppressor, to implement the Islamic penal code and to forbid evil. There are many other tasks that can only be fulfilled by appointing the Imam, and what is necessary in performing an obligation, is an obligation itself. We should state here that Imamah occurs by either naming a successor, as a group among Ahl As-Sunnah scholars said occurred - by the Prophet - in the case of Abu Bakr, or hinting to a successor. Or, the current Khalifah names a certain person as Khalifah after him, as Abu Bakr did with `Umar. Or, the Khalifah might leave the matter in the hands of the Muslim consultative council, or a group of righteous men, just as `Umar did. Or, the people of authority could gather around a certain person to whom they give the pledge of allegiance, or they could select one among them to choose the candidate, according to the majority of the scholars.
The Khalifah must be a responsible adult Muslim male, able to perform Ijtihad (independent legal judgments), bodily able, righteous, with knowledge of warfare, politics. He also must be from the tribe of Quraysh, according to the correct view, but it is not necessary that he be from the tribe of Bani Hashim, or that he be immune from error, as the Rafidah (Shiites) falsely claim.
When the Khalifah becomes an immoral person (Fasiq), should he be impeached There is disagreement over this matter, but the correct view is that he is not to be removed, because the Messenger of Allah said,
إِلَّا أَنْ تَرَوْا كُفْرًا بَوَاحًا عِنْدَكُمْ مِنَ اللهِ فِيهِ بُرْهَان
(Unless you witness a clear Kufr regarding which you have clear proof from Allah. )
Does the Khalifah have the right to resign from his post There is a difference on this issue. It is a fact that Al-Hasan bin `Ali removed himself from the position of Khalifah and surrendered it to Mu`awiyah. However, this occurred because of a necessity, and Al-Hasan was praised for this action.
It is not permissible to appoint two Imams for the world or more at the same time. This is not allowed because the Messenger of Allah said,
مَنْ جَاءَكُمْ وَأَمْرُكُمْ جَمِيعٌ يُرِيدُ أَنْ يُفَرِّقَ بَيْنَكُمْ فَاقْتُلُوهُ كَائِنًا مَنْ كَان
(Whoever came to you while you are united and tried to divide you, then execute him, no matter who he is.)
This is the view of the majority of scholars. Imam Al-Haramayn stated that Abu Ishaq allowed the appointment of two or more Imams when the various provinces are far away from each other. However, Imam Al-Haramayn himself was indecisive about this view.
وَعَلَّمَ ءَادَمَ الأَسْمَآءَ كُلَّهَا ثُمَّ عَرَضَهُمْ عَلَى الْمَلَـئِكَةِ فَقَالَ أَنبِئُونِى بِأَسْمَآءِ هَـؤُلاَءِ إِن كُنتُمْ صَـدِقِينَ - قَالُواْ سُبْحَـنَكَ لاَ عِلْمَ لَنَآ إِلاَّ مَا عَلَّمْتَنَآ إِنَّكَ أَنتَ الْعَلِيمُ الْحَكِيمُ - قَالَ يَـاءَادَمُ أَنبِئْهُم بِأَسْمَآئِهِمْ فَلَمَّآ أَنبَأَهُم بِأَسْمَآئِهِم قَالَ أَلَمْ أَقُل لَّكُمْ إِنِّي أَعْلَمُ غَيْبَ السَّمَـوَاتِ وَالاٌّرْضِ وَأَعْلَمُ مَا تُبْدُونَ وَمَا كُنتُمْ تَكْتُمُونَ
(31. And He taught Adam all the names (of everything), then He showed them to the angels and said, "Tell Me the names of these if you are truthful.'') (32. They (angels) said: "Glory is to You, we have no knowledge except what you have taught us. Verily, You are the Knower, the Wise.'') (33. He said: "O Adam! Inform them of their names,'' and when he had informed them of their names, He said: "Did I not tell you that I know the Ghayb (unseen) in the heavens and the earth, and I know what you reveal and what you have been concealing'')