Hadith no 1:
Narrated 'Umar bin Al-Khattab: I heard Allah's Apostle saying, The reward of deeds depends upon the intentions and every person will get the reward according to what he has intended. So whoever emigrated for worldly benefits or for a woman to marry, his emigration was for what he emigrated for.
Hadith no 2:
Narrated 'Aisha: (the mother of the faithful believers) Al-Harith bin Hisham asked Allah's Apostle O Allah's Apostle! How is the Divine Inspiration revealed to you? Allah's Apostle replied, Sometimes it is (revealed) like the ringing of a bell, this form of Inspiration is the hardest of all and then this state passes off after I have grasped what is inspired. Sometimes the Angel comes in the form of a man and talks to me and I grasp whatever he says. 'Aisha added: Verily I saw the Prophet being inspired divinely on a very cold day and noticed the sweat dropping from his forehead (as the Inspiration was over).
Hadith no 3:
Narrated 'Aisha: (the mother of the faithful believers) The commencement of the Divine Inspiration to Allah's Apostle was in the form of good dreams which came true like bright daylight, and then the love of seclusion was bestowed upon him. He used to go in seclusion in the cave of Hira where he used to worship (Allah alone) continuously for many days before his desire to see his family. He used to take with him the journey food for the stay and then come back to (his wife) Khadija to take his food likewise again till suddenly the Truth descended upon him while he was in the cave of Hira. The angel came to him and asked him to read. The Prophet replied, I do not know how to read. The Prophet added, The angel caught me (forcefully) and pressed me so hard that I could not bear it any more. He then released me and again asked me to read and I replied, 'I do not know how to read.' Thereupon he caught me again and pressed me a second time till I could not bear it any more. He then released me and again.
Hadith no 4:Narrated Jabir bin 'Abdullah Al-Ansari while talking about the period of pause in revelation reporting the speech of the Prophet While I was walking, all of a sudden I heard a voice from the sky. I looked up and saw the same angel who had visited me at the cave of Hira' sitting on a chair between the sky and the earth. I got afraid of him and came back home and said, 'Wrap me (in blankets).' And then Allah revealed the following Holy Verses (of Quran): 'O you (i.e. Muhammad)! wrapped up in garments!' Arise and warn (the people against Allah's Punishment),... up to 'and desert the idols.' (74.1-5) After this the revelation started coming strongly, frequently and regularly.
Hadith no 5:
Narrated Said bin Jubair: Ibn 'Abbas in the explanation of the statement of Allah Move not your tongue concerning (the Quran) to make haste therewith. (75.16) said Allah's Apostle used to bear the revelation with great trouble and used to move his lips (quickly) with the Inspiration. Ibn 'Abbas moved his lips saying, I am moving my lips in front of you as Allah's Apostle used to move his. Said moved his lips saying: I am moving my lips, as I saw Ibn 'Abbas moving his. Ibn 'Abbas added, So Allah revealed 'Move not your tongue concerning (the Qur'an) to make haste therewith. It is for Us to collect it and to give you (O Muhammad) the ability to recite it (the Quran)' (75.16-17) which means that Allah will make him (the Prophet) remember the portion of the Qur'an which was revealed at that time by heart and recite it. The statement of Allah: 'And when we have recited it to you (O Muhammad through Gabriel) then you follow its (Quran) recital' (75.18) means 'listen to it and be silent.' Then it is for Us (Allah) to make it clear to you'