The age of puberty is fifteen years

Question:
The Shaykh (may Allah have mercy on him) said: The jurists mentioned that one of the signs of puberty is reaching the age of fifteen. Does this mean that one is considered to have reached it during the fifteenth year, or does one not reach it until the sixteenth year?

Answer:
One must complete fifteen years. This is the upper limit for puberty according to the Hanbalis. The Hanafis say no; it is obligatory that one be eighteen years old. But the Hanbalis say fifteen years, based on the fact that Ibn 'Umar (may Allah be pleased with him) was presented to the Prophet (peace and blessings be upon him) for jihad in the year of Uhud, but he did not permit it. He was presented to him in the year of the Trench, and he had reached fifteen years of age, so he permitted him to carry weapons. This indicates that the age of puberty is fifteen years. Yes.