Muhammad bin Al-Munkadir narrated from Jabir, that a man was mentioned in the presence of the Prophet (s.a.w) for his worship and striving in it, and another man was mentioned for his cautious piety. So the Prophet (s.a.w) said:
"Nothing is equal to cautious piety." (AR)
English reference (AR): Vol. 4, Book 11, Hadith 2519 (AR)
Arabic reference (AR): Book 37, Hadith 2710 (AR)