Their arrival synchronized with the conquest of Khyber by the Muslims.

Their arrival synchronized with the conquest of Khyber by the Muslims. Jaafer ibn Abi Talib was the leader of all those Muslims who had migrated to Abyssinia in 615 and 616. He appears to have been the only member of the clan of Banu Hashim to leave for Abyssinia with the other refugees. All other members of Banu Hashim stayed in Makkah.

Montgomery Watt Apart from two exceptions all the early Muslims who remained in Mecca (and did not go to Abyssinia) belonged to a group of five clans, headed by Mohammed's clan of Hashim. This group seems to be a reconstituted form of the League of the Virtuous. It is thus the focus of the opposition to the leading merchants…