The Meccan Period
Hamza and Umar Accept Islam
The conversions of Hamza ibn Abd al-Muttalib and then Umar ibn al-Khattab strengthened the Muslims openly; the believers prayed publicly at the Ka'bah for the first time after Umar's Islam.
Sources
- Ibn Hisham, al-Sirah — 1/342
- Ibn Kathir, al-Bidaya wa'l-Nihaya — 3/79