The prayer of the Messenger of Allah ﷺ was such that when he prayed and bowed, when he raised his head from bowing, when he prostrated, when he raised his head from prostration, and between the two prostrations, each of these was nearly equal in length.
حدثنا محمد بن جعفر حدثنا شعبة عن الحكم قال فحدثني به ابن أبي ليلى قال فحدث أن
كانت صلاة رسول الله ﷺ إذا صلى فركع وإذا رفع رأسه من الركوع وإذا سجد وإذا رفع رأسه من السجود وبين السجدتين قريبا من السواء
Its isnad is sahih. It is found in Bukhari 1/202, in the chapter on prayer, on tranquility when raising the head, Shaab edition, and Muslim 1/343, no. 471, and Abu Dawud 1/225, no. 852, and Nasai 2/197, no. 1065, and Darimi 1/352, no. 1333.