Musannaf Ibn Abi Shaybah 11790 — Those who said five takbirs

Abd al-Rahman bin Abi Layla said: Sayyiduna Zayd (may Allah be pleased with him) used to say four takbirs over our funerals, then he said five takbirs over one funeral. We asked him, and he said: The Messenger of Allah (peace and blessings be upon him) used to say takbirs (this way).