Supplication said to one who does you a favour

Instruction Dua said to one who does you a favour — note Open ↗

If someone does you a favour and you say:

Dua said to one who does you a favour Open ↗

جَزاكَ اللهُ خَـيْراً.

Jazakal-lahu khayran.

Translation

May Allah reward you with goodness.

When to recite

Said to someone who does you a kindness or favour.

Narration Dua said to one who does you a favour — context Open ↗

…then you have indeed excelled in praising him.