1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from abu Muhammad al-Mada’iniy from ‘A’idh ibn Habib Bayya’ al-Harawiy from ‘Isa ibn Zayd in a marfu‘ manner who has said the following: “Abu ‘Abd Allah (a.s.), has stated this Hadith. ‘Children’s milk teeth are replaced in seven years. They must be instructed to perform Salat (prayer) at the age of nine years, their bed must be separated at the age of ten, they experience wet dream at the age of fourteen, their growth in length stops at the age of twenty-two and their growth of reason stops at the age twenty-eight except experiences.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

2. Muhammad ibn Yahya has narrated from Muhammad ibn Ahmad from Musa ibn ‘Umar from Ali ibn al-Husayn (ibn al-Hassan) al- Darir from Hammad ibn ‘Isa who has said the following: “Abu ‘Abd Allah (a.s.), has said that ’Amir al-Mu’minin (a.s.), has said, ‘A child grows every year by four fingers of his own fingers.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

3. Ali ibn Ibrahim has narrated from his father from al-Nawfaliy from al-Sakuniy who has said the following: “Abu ‘Abd Allah (a.s.), has narrated from his father (a.s.), who has said, that a boy cannot impregnate until his breast becomes round and the smell of his armpit rises strong.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.