It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When Allah Almighty created Adam (peace be upon him) and breathed the soul into him, he sneezed and, by the permission of Allah, said 'Alhamdu lillah' (All praise is for Allah). His Lord said: O Adam! Your Lord has had mercy on you. Then Allah said: O Adam! Go to that group of angels who are sitting there and say 'Assalamu alaykum' (Peace be upon you). He went (and greeted them), and the angels replied 'Wa alaykas-salamu wa rahmatullahi wa barakatuh' (And upon you be peace, and the mercy of Allah and His blessings). Then he returned to his Lord, and Allah said: This is the greeting of you and your offspring among one another. Then Allah, with both His Hands closed, said: Choose whichever of them you wish. Adam (peace be upon him) said: I choose the Right Hand of my Lord, and both Hands of my Lord are right (blessed and full of good). Then Allah opened His Hand, and in it were Adam and all his offspring (descendants). Adam (peace be upon him) said: O my Lord! Who are these? Allah said: These are your offspring. The lifespan of every human being was written between his two eyes. Adam (peace be upon him) saw among them a man who was the most radiant of them, but only forty years had been written for him. Adam (peace be upon him) said: O Lord! Increase his lifespan. Allah said: This is what has been written for him. Adam (peace be upon him) said: I have given him sixty years from my own lifespan. Allah said: That is your choice. Then Adam (peace be upon him) remained in Paradise for as long as Allah willed, then he was sent down from there to the earth and began counting the days of his life. When the Angel of Death came to him, Adam (peace be upon him) said: You have come early; a thousand years were written for me. The angel said: Yes, but you gave sixty years of your lifespan to your son Dawud (peace be upon him). So Adam (peace be upon him) denied it (out of human nature), and his offspring also began to deny; and he forgot, and his offspring also began to forget. From that day, writing and witnesses were commanded (in dealings)." This hadith is sahih (authentic) on the condition of Muslim, because he used al-Harith bin Abd al-Rahman as evidence. Narrators other than Safwan have also narrated it from him, but I mentioned Safwan's chain because it is a high (short) chain.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said something similar (to the previous hadith). This is a sahih supporting report (shahid) for it.