And Hajjaj ibn al-Sha'ir narrated to me, Hasan al-Ashyab narrated to us, Shayban narrated to us, from Yahya, who said: Abu Salama informed me that he heard Ibn 'Umar — may God be pleased with them both — saying: I heard the Messenger of God, peace and blessings be upon him, say: "The month is twenty-nine [days]."