´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."
Hadith Referenceسنن ترمذي / كتاب الطهارة عن رسول الله صلى الله عليه وسلم / 14
Hadith Gradingالألبانی:صحيح، صحيح أبي داود (11) ، الصحيحة (1071) | زبیر علی زئی:إسناده ضعيف / د 14