Musannaf Ibn Abi Shayba 3:1691

Zayd ibn al-Hubab narrated to us, from Ayyash al-Hadrami, who said: Yahya ibn Maymun, the judge of Egypt, informed us, saying: Sahl ibn Sa’d narrated to me that the Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever waits for the prayer, he is in a state of prayer as long as he does not break his ablution."