He said, "Alqama and I went in to see Abdullah bin Masud, and he asked us, 'Have these people prayed yet?'We said, 'No.'He said, 'Get up and pray.'So we went to stand behind him, but he placed one of us on his right and the other on his left, then he led us in prayer without adhan or iqama. When he bowed, he interlaced his fingers and placed them between his knees. He said, 'This is how I saw the Messenger of Allah ﷺ do it.'"
أخبرنا إسحق بن إبراهيم قال أنبأنا عيسى بن يونس قال حدثنا الأعمش عن إبراهيم
قال دخلت أنا وعلقمة على عبد الله بن مسعود فقال لنا أصلى هؤلاء قلنا لا قال قوموا فصلوا فذهبنا لنقوم خلفه فجعل أحدنا عن يمينه والآخر عن شماله فصلى بغير أذان ولا إقامة فجعل إذا ركع شبك بين أصابعه وجعلها بين ركبتيه وقال هكذا رأيت رسول الله ﷺ فعل
Muslim reported it in the Book of Mosques, chapter on the recommendation to place the hands on the knees in ruku and the abrogation of tatbiq, hadith no. 534, from the hadith of Amash with the same chain, and it is also in Kubra, hadith no. 798.