"Therefore remember Me (by praying, glorifying, etc.). I will remember you, and be grateful to Me (for My countless Favours on you) and never be ungrateful to Me.
O you who believe! Seek help in patience and As-Salat (the prayer). Truly! Allah is with As-Sabirin (the patient ones, etc.)"
(Surah 2: Al-Baqarah (The Cow); verses 152-3)