Allah SWT has said: “Therefore remember Me, I will remember you and be grateful to Me, and reject not faith.” Al-Baqarah 2:152

The Prophet also said: ‘Allah SWT says: `indeed I am as My servant presumes Me to be, and I am with him when he remembers Me, so if he remembers Me to himself, I remember him to Myself, and if he remembers Me amongst a company, I remember him amongst a company greater than it, and if he draws near to Me the span of a hand, I draw near to him the span of an arm, and if he draws to Me the span of arm I draw near to him the span of two outstretched arms, and if he takes a step towards Me, I hastily step towards him.`[Al-Bukhari 5/175 and Muslim 4/2061, this specific wording is related to by Al-Bukhari]