Musannaf Ibn Abi Shaybah 39311 — Reports on how old the Prophet

Sayyiduna Anas bin Malik (may Allah be pleased with him) reports that the Prophet (peace and blessings be upon him) was sent as a prophet at the age of forty years. He (peace and blessings be upon him) resided for ten years in Makkah and ten years in Madinah, and he (peace and blessings be upon him) passed away at the age of sixty years.