«كان إذا صلى الغداة جاءه أهل المدينة بآنيتهم فيها الماء فما يؤتى بإناء إلا غمس يده فيه»
It was the practice of the Prophet (peace and blessings be upon him):
"When he (peace and blessings be upon him) had prayed the Fajr prayer, the people of Madinah would come to him (peace and blessings be upon him) with their vessels containing water, and whatever vessel was brought, he (peace and blessings be upon him) would dip his hand into it."
Hadith Referenceصحیح الجامع الصغیر / حرف الكاف / 4746