(1) باب فَضْلِ الدُّعَاءِ
It was narrated from Nu'man bin Bashir that :
the Messenger of Allah (saas) said: "Indeed the supplication is the worship." Then he recited: "And your Lord said: Invoke Me, I will respond to you."
Reference: Sunan Ibn Majah 3828
In-book reference: Book 34, Hadith 2
English translation: Vol. 5, Book 34, Hadith 3828