#1070
اللّهُـمَّ أَطْعِمْ مَن أَطْعَمَني وَاسْقِ مَن سقاني
Transliteration
Allāhumma aṭ`im man aṭ`amanīwasqi man saqānī.
Translation
O Allah, feed the one who has fed me, and give drink to the one who has given me drink.
Dua #1070•Muslim 3/126.
To one who intends to give food or drink
Hisnul Muslim