An-Nu`man bin Bashir narrated that: The Prophet (peace be upon him) said: “The supplication, is worship.” Then he recited: And Your Lord said: “Call upon me, I will respond to you. Verily, those who scorn My worship, they will surely enter Hell humiliated.”
Jami` at-Tirmidhi, Vol. 6, Book 48, Hadith 3
