After that time a fresh revelation turned them in the
direction of Meccah, Southwards: on which occasion the Archangel
Gabriel descended and miraculously opened through the hills and wilds a
view of the Ka'abah, that there might be no difficulty in ascertaining
its true position.
After the capture of Khaybar in A.H. 7, the Prophet and his first three
successors restored the Mosque, but Moslem historians do not consider
this a second foundation. Mohammed laid the first brick, and Abu
Hurayrah declares that he saw him carry heaps of building materials
piled up to his breast. The Caliphs, each in the turn of his
succession, placed a brick close to that laid by the Prophet, and aided
him in raising the walls. Al-Tabrani relates that one of the Ansar had
a house adjacent which Mohammed wished to make part of the place of
prayer; the proprietor was promised in exchange for it a home in
Paradise, which he gently rejected, pleading poverty. His excuse was
admitted, and Osman, after purchasing the place for ten thousand
dirhams, gave it to the Apostle on the long credit originally offered.
This Mosque was a square of a hundred cubits. Like the former building,
it had three doors: one on the South side, where the Mihrab al-Nabawi,
or the "Prophet's Niche," now is; another in the place of the present
Bab al-Rahmah; and the third at the Bab Osman, now called the Gate of
Gabriel.