Musannaf Ibn Abi Shaybah 27146 — What a man is commanded: letting

Ubaydullah bin Abi Rafi' said: I saw Sayyiduna Abu Sa'id, Sayyiduna Rafi' bin Khadij, Sayyiduna Salamah bin al-Akwa', Sayyiduna Ibn Umar, Sayyiduna Jabir bin Abdullah and Sayyiduna Abu Usayd (may Allah be pleased with them); all of them used to have their moustaches cut right down, in the manner of shaving.