Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: The Messenger of Allah (peace and blessings be upon him) announced the deaths of the martyrs of Mu'tah from the pulpit, one by one. He began with Sayyiduna Zayd bin Harithah (may Allah be pleased with him), then Sayyiduna Ja'far bin Abi Talib (may Allah be pleased with him), then Sayyiduna Abdullah bin Rawahah (may Allah be pleased with him), may Allah have mercy on them all. Then he said: "Then Sayyiduna Khalid bin al-Walid (may Allah be pleased with him) took up the banner, and he is one of the swords of Allah."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1446