For someone who gives you food or drink
For someone who gives you food or drink: 1 supplication in Arabic with English translation and sources, from the Fortress of the Muslim (Hisn al-Muslim).
التعريض بالدعاء لطلب الطعام أو الشراب
اللَّهُمَّ أَطْعِمْ مَنْ أَطْعَمَنِي، وَاسْقِ مَنْ سَقَانِي.
O Allah, feed the one who fed me and give drink to the one who gave me drink.
Fortress of the Muslim (Hisn al-Muslim), Sa‘id ibn ‘Ali al-Qahtani. MushafPlus translation made from the Arabic, not reviewed by a specialist.