Musannaf Ibn Abi Shaybah

Hazrat Jabir narrates that the incident of the beginning of Hazrat Umar’s acceptance of Islam was as follows: He says that one night my sister was in labor, so I was sent out of the house. On a dark night, I entered the curtains of the Kaaba. Meanwhile, the Messenger of Allah (peace and blessings be upon him) arrived and entered inside with his shoes and prayed as much as Allah willed. Then I heard a voice that I had never heard before. I started following that voice. The Prophet (peace and blessings be upon him) said, “Who is it?” I said, “It is Umar.” He said, “O Umar! What is the matter that you do not leave us alone, neither by day nor by night?” I feared that the Prophet (peace and blessings be upon him) might pray against me. Therefore, I said, “I bear witness that there is no god but Allah and you are the Messenger of Allah.” He said, “O Umar, keep this matter secret.” I said, “By Him in whose hand is my soul, just as I proclaimed shirk, I will also proclaim faith.”