Musannaf Ibn Abi Shaybah 16932 — A man who frees his slave woman

Qatadah said: Once Bashir bin Ka'b recited this verse: {So walk among its slopes} [al-Mulk: 15], and then said to his slave-girl: If you can tell me the meaning of 'manakibiha', you are free for the sake of Allah. She said: It means its mountains. On hearing this, the colour of Bashir bin Ka'b's face changed, for he loved this slave-girl. He then began asking people about it, whether he should free her or not. Some told him to free her and some forbade him. He asked Sayyiduna Abu al-Darda' (may Allah be pleased with him), who said: Leave what puts you in doubt for what does not put you in doubt; good lies in tranquillity, and evil lies in doubt. So Bashir bin Ka'b left that slave-girl.