(5) باب الْغَدْوَةِ وَالرَّوْحَةِ فِي سَبِيلِ اللَّهِ، وَقَابُ قَوْسِ أَحَدِكُمْ مِنَ الْجَنَّةِ
Narrated Sahl bin Sa`d:
The Prophet (ﷺ) said, "A single endeavor in Allah's Cause in the afternoon and in the forenoon is better than the world and whatever is in it."
Reference: Sahih al-Bukhari 2794
In-book reference: Book 56, Hadith 12
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 52, Hadith 52