Zadhan narrates that Sayyiduna Ali bin Abi Talib, may Allah be pleased with him, drank water while standing. The people looked at him with astonishment. He said: What are you looking at? If I drink while standing, then I have seen the Noble Prophet, peace and blessings be upon him, drink while standing, and if I drink while sitting, then I have seen the Noble Prophet, peace and blessings be upon him, drink while sitting.

Sayyida Aisha (may Allah be pleased with her) narrates that the Noble Prophet (peace and blessings be upon him) drank water both while standing and sitting. He (peace and blessings be upon him) would walk barefoot as well as with shoes on, and after finishing the prayer, sometimes he would turn to the right side and sometimes to the left side.

Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates that the Messenger (peace and blessings of Allah be upon him) drank Zamzam water while standing, and in another narration: He (peace and blessings of Allah be upon him) drank Zamzam water from a bucket while standing.

(Second chain) Imam Sha'bi says that it is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them), he says: I gave Zamzam water to the Noble Prophet (peace and blessings be upon him), while he (peace and blessings be upon him) was standing.

Abu Bazri Waki’ Sadoosi narrates, he says: I asked Sayyiduna Ibn Umar (may Allah be pleased with them both) about drinking water while standing. He said: In the time of the Prophet Muhammad (peace and blessings be upon him), we used to drink while standing and also eat while walking.

Muslim (the Tabi'i) asked Sayyiduna Abu Hurairah, may Allah be pleased with him, whether it is permissible to drink water while standing. He replied: O nephew! I saw the Noble Prophet, peace and blessings be upon him, tie the knee of his mount and make it sit down, and I was holding the reins of that mount, and I had placed my foot on the front leg of the mount. Some people from the Quraysh came and gathered around the Noble Prophet, peace and blessings be upon him. A vessel of milk was brought to the Noble Prophet, peace and blessings be upon him, and he drank it while he was still on the mount. Then he handed it to the one who was on his right side and closest to him. The Noble Prophet, peace and blessings be upon him, also drank while standing, and the entire group also drank while standing.