The word(s) "doubles" appears 2 time(s) in 2 verse(s) in Quran in Mohsin Khan translation.

(1) And the likeness of those who spend their wealth seeking Allah's Pleasure while they in their ownselves are sure and certain that Allah will reward them (for their spending in His Cause), is the likeness of a garden on a height; heavy rain falls on it and it doubles its yield of harvest. And if it does not receive heavy rain, light rain suffices it. And Allah is All-Seer (knows well) of what you do.

(2) Surely! Allah wrongs not even of the weight of an atom (or a small ant), but if there is any good (done), He doubles it, and gives from Him a great reward.