Kitáb-i-Aqdas

Question: In a treatise in Persian on various questions, the age of maturity hath been set at fifteen; is marriage likewise conditional upon the reaching of maturity, or is it permissible before that time?

Answer: Since the consent of both parties is required in the Book of God, and since, before maturity, their consent or lack of it cannot be ascertained, marriage is therefore conditional upon reaching the age of maturity, and is not permissible before that time.