It was narrated from ‘Abdur-Rahman bin Abi ‘Amrah, from a grandmother of his who was called Kabshah Al-Ansariyyah, that the Messenger of Allah (ﷺ) entered upon her, and there was a water skin hanging there. He drank from it while standing, and she cut off the mouth of the water skin, seeking the blessing of the place where the mouth of the Messenger of Allah (ﷺ) had been.
Maulana Ataullah Sajid
Benefits and Issues: It is permissible to preserve items that have touched the blessed body of the Prophet (sallallahu alayhi wa sallam) as a means of seeking blessing (tabarruk). This practice is not correct with regard to anyone else. The Companions (radi Allahu anhum ajma'in) and the Followers (tabi'in, rahimahumullah) did not preserve the relics of Companions such as Abu Bakr and Umar (radi Allahu anhum ajma'in) for the purpose of seeking blessing (tabarruk).
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 3423
Sayyida Kabsha (may Allah be pleased with her) narrates: The Noble Prophet (peace and blessings of Allah be upon him) came to my place, and he drank water while standing from the mouth of a hanging water-skin. The woman narrates: I cut off the mouth of the water-skin. The narrator named Sufyan has sometimes mentioned the woman's name as Kabsha and sometimes as Kabishah, and most often he has mentioned her name as Kabishah.
Shaykh Muhammad Ibrahim bin Basheer
Benefit: It is established from this hadith that at times it is permissible to drink water while standing, and the ahadith in which there is prohibition are to be understood as indicating dislike (makruh), meaning that drinking water while standing is contrary to what is preferable (khilaf awla).
Source: Musnad al-Humaydi: Commentary by Muhammad Ibrahim bin Bashir, Page: 357