Yahya bin Bukayr said: Sayyiduna Yazid bin Abi Sufyan (may Allah be pleased with him) passed away in Syria in the year 18 AH. He had appointed Sayyiduna Mu'awiyah (may Allah be pleased with him) as his successor, and Sayyiduna Umar (may Allah be pleased with him) confirmed him in that post.
Hadith Referenceالمعجم الكبير للطبراني / باب الياء / 18826
Yahya bin Sa'id al-Ansari narrates that when Sayyiduna Abu Bakr (may Allah be pleased with him) sent Sayyiduna Yazid bin Abi Sufyan (may Allah be pleased with him) to Syria, he walked along with him on foot. Yazid (may Allah be pleased with him) said to him: "Either you ride, or I will dismount." He said: "I will not ride, and you will not dismount; I count these steps of mine for reward before Allah."
Hadith Referenceالمعجم الكبير للطبراني / باب الياء / 18827