Silsilat al-Ahadith al-Sahihah

The wife of the Messenger, Sayyidah Umm Salamah (may Allah be pleased with her), says: When the land of Makkah became constricted for us, the companions of the Messenger were subjected to hardships and trials, and they saw the tribulations and tests we were afflicted with because of our religion, (for the time being) the Messenger of Allah (peace and blessings be upon him) could not remove them, and the Messenger of Allah (peace and blessings be upon him) himself had strength and honor due to his people and his uncle, so he was protected from the hardships in which the general companions were involved. (One day) the Messenger of Allah (peace and blessings be upon him) said to them: "In Abyssinia there is a king, in whose kingdom no one is wronged. Go and join him, until Allah provides relief and a way out from these hardships." We (acted upon this suggestion and) set out in groups (from Makkah) and gathered at a most excellent place and with the best neighbor. He gave us security regarding our religion and we had no fear of any kind of oppression from his side. The narrator mentioned a lengthy hadith; similarly, this narration is in the Sunan and the complete narration is mentioned in four pages.