Al ʿAbbas bin ʿAbdul-Muttalib asked the permission of Messenger of Allah ﷺ to let him stay in Mecca during the nights of Mina in order to provide the pilgrims with water to drink, so the Prophet ﷺ permitted him. (Using translation from Bukhārī 1634)   

«رَخَّصَ رَسُولُ اللهِ ﷺ لِلْعَبَّاسِ بْنِ عَبْدِ الْمُطَّلِبِ أَنْ يَبِيتَ بِمَكَّةَ أَيَّامَ مِنًى مِنْ أَجْلِ سِقَايَتِهِ»