Musannaf Ibn Abi Shayba 3:240

Abu Bakr narrated to us, he said: Ibn Idris narrated to us, from ‘Asim ibn Kulayb, from his father, who said: ‘Abdullah ibn Yazid al-Khatmi, when he would raise his head from the bowing (ruku‘), would descend with the takbir, as if he were on a swing, until he prostrated.