‏الصلاة : Hadeeth No:979 Abu Huraira reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: The nearest a servant comes to his Lord is when he is prostrating himself, so make supplication (in this state)....

‏الذكر والدعاء والتوبة والاستغفار‏ : Hadeeth No:6591 This hadith has been narrated on the authority of Safwan b. 'Abdullah b. Safwan with the same chain of transmitters....