Musannaf Ibn Abi Shaybah 25738 — Those who permitted drinking

It is narrated from Ayyub that he said: I received word concerning Maymun bin Mihran that he said: Umar bin Abd al-Aziz saw me while I was drinking water. I would then stop while drinking and take a breath. He said: It is only forbidden to breathe inside the vessel. So if you do not breathe inside the vessel, then, if you wish, drink the water in a single breath.