(1) باب ذِكْرِ أَفْضَلِ الأَعْمَالِ
It was narrated from Abu Hurairah that:
The Messenger of Allah [SAW] was asked: "Which deed is best?" "He said: Faith in Allah [SWT] and His messenger [SAW]." (DE)
Reference (DE): Sunan an-Nasa'i 4985 (DE)
In-book reference (DE): Book 47, Hadith 1 (DE)
English translation (DE): Vol. 6, Book 47, Hadith 4988 (DE)