Alqama and Aswad reported,

We came to Abdullah bin Masud at his house, and he asked, "Have these people prayed behind you?"We said, "No."He said, "Then stand and pray." He did not instruct us to make the call to prayer or the iqamah.We went to stand behind him, but he took us by our hands and placed one of us on his right and the other on his left.When he bowed, we placed our hands on our knees, but he struck our hands away, then joined his palms together and placed them between his thighs.When he had finished praying, he said, "There will come over you rulers who will delay the prayer past its proper time and squeeze it until barely any time remains before sunset. When you see them doing that, pray the prayer at its proper time and make your prayer with them a voluntary one. If you are three, pray together, and if you are more than that, let one of you lead the others. When one of you bows, let him spread his forearms upon his thighs, bend forward, and join his palms together. It is as if I can still see the spread fingers of the Messenger of Allah ﷺ," and he demonstrated it to them.

Muslim 1191

Sahih

حدثنا محمد بن العلاء الهمداني أبو كريب قال حدثنا أبو معاوية عن الأعمش عن إبراهيم

عن الأسود وعلقمة قالا

أتينا عبد الله بن مسعود في داره فقال أصلى هؤلاء خلفكم فقلنا لا قال فقوموا فصلوا فلم يأمرنا بأذان ولا إقامة قال وذهبنا لنقوم خلفه فأخذ بأيدينا فجعل أحدنا عن يمينه والآخر عن شماله قال فلما ركع وضعنا أيدينا على ركبنا قال فضرب أيدينا وطبق بين كفيه ثم أدخلهما بين فخذيه قال فلما صلى قال إنه ستكون عليكم أمراء يؤخرون الصلاة عن ميقاتها ويخنقونها إلى شرق الموتى فإذا رأيتموهم قد فعلوا ذلك فصلوا الصلاة لميقاتها واجعلوا صلاتكم معهم سبحة وإذا كنتم ثلاثة فصلوا جميعا وإذا كنتم أكثر من ذلك فليؤمكم أحدكم وإذا ركع أحدكم فليفرش ذراعيه على فخذيه وليجنأ وليطبق بين كفيه فلكأني أنظر إلى اختلاف أصابع رسول الله ﷺ فأراهم

مسلم 1191صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Mosques and places of prayer
Chapter
Recommendation to place the hands on the knees in ruku and abrogation of clasping
Numbering
Darussalam 1191
Muslim 1191