Musannaf Ibn Abi Shaybah 34107 — Reports on Abu Bakr al-Siddiq

Hisham bin Urwah (may Allah have mercy on him) said that his father Urwah (may Allah have mercy on him) said: Sayyiduna Abu Bakr (may Allah be pleased with him) freed these seven people who were being tormented for the sake of Allah. These seven are: Sayyiduna Amir bin Fuhayrah (may Allah be pleased with him), Sayyiduna Bilal (may Allah be pleased with him), Sayyidah Zinnirah (may Allah be pleased with her), Sayyidah Umm Ubays (may Allah be pleased with her), Sayyidah al-Nahdiyyah (may Allah be pleased with her) and her daughter, and a slave girl of Banu Amr bin Mu'ammal.