Musannaf Ibn Abi Shayba 3:1631

Narrated to us Abd al-Wahhab, from Hisham, from al-Hasan, from Ibn Abi Arubah, from Qatadah, regarding a man who forgot the recitation in the Dhuhr and Asr [prayers] until he finished his prayer. He said: It is sufficient for him, provided he completed the bowing (ruku) and the prostration (sujud).