Musannaf Ibn Abi Shaybah 3019 — How the tashahhud in prayer is recited

Sayyiduna Ibn Umar (may Allah be pleased with them both) says: Sayyiduna Abu Bakr (may Allah be pleased with him) used to teach the words of the tashahhud on the pulpit just as children are taught. Those words were: All verbal worship, physical worship and financial worship are for Allah. Peace be upon you, O Prophet, and may the mercy of Allah and His blessings descend upon you. Peace be upon us too, and peace be upon the righteous servants of Allah as well. I bear witness that there is no deity except Allah, and I bear witness that Muhammad (peace and blessings be upon him) is the servant of Allah and His Messenger.