Sahih Muslim · Hadith 1304
The Book of Mosques and Places of Prayer - كتاب الْمَسَاجِدِ وَمَوَاضِعِ الصَّلاَةِ
وحدثناه عبد الله بن عبد الرحمن الدارمي، أخبرنا يحيى بن حسان، حدثنا وهيب بن خالد، حدثنا منصور، بهذا الإسناد وقال منصور " فلينظر أحرى ذلك للصواب " .
This hadith is reported by Mansur with the same chain of transmitters, but with these words: " He should aim at correct (prayer) and it is advisable."
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).