Sahih Muslim · Hadith 1301
The Book of Mosques and Places of Prayer - كتاب الْمَسَاجِدِ وَمَوَاضِعِ الصَّلاَةِ
حدثني أحمد بن عبد الرحمن بن وهب، حدثني عمي عبد الله، حدثني داود بن قيس، عن زيد بن أسلم، بهذا الإسناد وفي معناه قال " يسجد سجدتين قبل السلام " . كما قال سليمان بن بلال .
This hadith has been narrated by Zaid b. Aslam with the same chain of transmitters and he said: He should perform two prostrations before the salutation, as it was mentioned by Sulaiman b. Bilal.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).