عن أبي هريرة رضي الله عنه قال، قال رسول الله (ص): "يقول الله عز وجل: أنا عند ظن عبدي بي، إن ذكرني في نفسه ذكرته في نفسي، وإن ذكرني في ملأ ذكرته في ملأهم خير منهم، وإن تقرب إلي شبرا تقربت إليه ذراعا، وإن تقرب إلي ذراعا تقربت إليه باعا، وإن أتاني يمشي أتيته هرولة." رواه البخاري

On the authority of Abu Hurayrah (may Allah be pleased with him), who said that the Prophet (peace be upon him) said: Allah the Almighty said:
"I am as My servant thinks I am. I am with him when he makes mention of Me. If he makes mention o...f Me to himself, I makes mention of him to Myself; and if he makes mention of Me in an assembly, I make mention of him in an assemble better than it. And if he draws near to Me an arm's length, I draw near to him a fathom's length. And if he comes to Me walking, I go to him at speed." (al-Bukhari)