Quran 9:121

وَلَا يُنفِقُونَ نَفَقَةً۬ صَغِيرَةً۬ وَلَا ڪَبِيرَةً۬ وَلَا يَقۡطَعُونَ وَادِيًا إِلَّا ڪُتِبَ لَهُمۡ لِيَجۡزِيَهُمُ ٱللَّهُ أَحۡسَنَ مَا ڪَانُواْ يَعۡمَلُونَ ١٢١

Nor do they incur any expense, small or large, nor do they cross any valley, without having the credit written down for them. ALLAH will surely reward them generously for their works.