It is narrated from Sayyiduna Anas (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings be upon him) intended to relieve himself, he would not lift his garment until he was close to the ground. Imam Darimi Abu Muhammad (may Allah have mercy on him) said: This is also among the etiquettes of relieving oneself and is similar to the hadith of Mughira.
Hadith Takhrijاس سند سے یہ روایت ضعیف ہے، کیونکہ اعمش کا سماع سیدنا انس رضی اللہ عنہ سے ثابت نہیں۔ تخریج کے لئے دیکھئے: [أبوداؤد 14] ، [ترمذي 14 بهذا السند، وله شاهد صحيح عند البيهقي 96/1]
´Anas, may Allah Most High be pleased with him, said:` "When the Prophet wanted to relieve himself, he would not raise his garment until he was close to the ground."
Shaykh Dr. Abdur Rahman Freywai
English Translation: 1: Here, by "mursal" what is meant is "munqati‘" (disconnected). Its explanation has been given by Imam Tirmidhi rahimahullah himself, that Al-A‘mash did not hear from Anas radi Allahu anhu. Generally, in technical terminology, "mursal" is: A hadith in which, from the end of the chain, the narrator after the Tabi‘i is omitted. Such a narration is weak because the continuity of the chain (ittisal al-isnad) is missing, which is an essential condition for a sahih (authentic) hadith. Likewise, the omitted narrator is not identified, and it is possible that he is someone other than a Companion (sahabi). In this case, the likelihood of its weakness increases. And "inqita‘" (disconnection) means that a narrator is missing in the chain.
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 14
Narrated Abdullah ibn Umar: When the Prophet ﷺ wanted to relieve himself, he would not raise his garment, until he lowered himself near the ground. Abu DAwud said: This tradition has been transmitted by Abd al-Salam bin Harb on the authority of al-Amash from Anas bin Malik. This chain of narrators is weak (because Amash's hearing tradition from Anas bin Malik is not established).
Shaykh Umar Farooq Saeedi
Benefits and Issues This narration is weak; however, it is still better that a person should exercise utmost caution in avoiding nakedness (being unclothed) even in seclusion, because Allah Ta'ala is most deserving that one should feel modesty before Him.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 14