"If someone does you a favour then you say:
جَزَاكَ اللَّهُ خَيْراً
May Allah reward you with good.
Jazaakallaahu khayran.
At-Tirmithi (no. 2035). See also Al-Albani, Sahih At-Tirmithi 2/200 and Sahihul-Jami' (no. 6244).
"If someone does you a favour then you say:
جَزَاكَ اللَّهُ خَيْراً
May Allah reward you with good.
Jazaakallaahu khayran.
At-Tirmithi (no. 2035). See also Al-Albani, Sahih At-Tirmithi 2/200 and Sahihul-Jami' (no. 6244).