9-15 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Muhammad ibn Yahya al-Attar quoted Ahmad ibn Muhammad ibn Isa, on the authority of his father, on the authority of Safvan ibn Yahya, on the authority of Musa ibn Bakr, on the authority of Zurarah that Abi Ja’far al-Baqir (MGB) said, “Do not consummate (the marriage with your) female slave until she reaches the age of nine or ten.” He added, “I either heard nine or ten.”