Musannaf Ibn Abi Shaybah 1955 — Those who set no time limit for wiping

Yazid bin Abi Habib said: Sayyiduna Abu Ubaydah bin al-Jarrah (may Allah be pleased with him) sent Sayyiduna Uqbah bin Amir (may Allah be pleased with him) to Sayyiduna Umar (may Allah be pleased with him) with the news of the conquest of Damascus. He set out on a Friday and reached him on a Friday. Sayyiduna Umar (may Allah be pleased with him) asked him: "When did you set out?" He told him, and he also told him: "Since I set out, I have not taken off my khuffs (leather socks)." Sayyiduna Umar (may Allah be pleased with him) said: "You did well."