From Sahih Muslim (Hadith 6807):
Hammam b. Munabbih reported so many ahadith from Abu Huraira and one out of them is this that Allah's Messenger (ﷺ) said that Allah thus stated:When My servant draws close to me by the span of a palm, I draw close to him by the space of a cubit, and when he draws close to Me by the space of a cubit, I draw close to him by the space (covered) by two hands, and when he draws close to Me by the space (covered by) two hands, I go in hurry towards him
Reference: Muslim 6807