When Jibreel visited
The Messenger of Allah (peace be up;on him) was the most generous of the men; and he was the most generous during the month of Ramadan when Jibreel visited him every night and recited the Qur’an to him. During this period, the generosity of Messenger of Allah (peace be upon him) waxed faster than the rain bearing wind. (Al-Bukhari and Muslim)
