Allah's Apostle (Sallallahu 'Alaihi Wa Sallam) said, "Allah says, 'If My
slave intends to do a bad deed then (O Angels) do not write it unless he
does it; if he does it, then write it as it is, but if he refrains from
doing it for My Sake, then write it as a good deed (in his account). (On
the other hand) if he intends to go a good deed, but does not do it, then
write a good deed (in his account), and if he does it, then write it for
him (in his account) as ten good deeds up to seven-hundred times.' "

Bukhari Vol. 9 : No. 592

—