And al-Qasim ibn Zakariyya narrated to me, Husayn ibn Ali narrated to us, from Za'idah, from Isma'il, from Muhammad ibn Sa'd, from his father — may God be pleased with him — from the Prophet, peace and blessings be upon him, who said: "The month is like this, and like this, and like this" — ten, ten, and nine, once.