Dua for someone who tells you May Allah bless you.
Here is a dua for someone who tells you: بَارَكَ اللَّهُ فِيك “May Allah bless you. Wafeekabaarakallaahu. “And may Allah bless you.” وَفيكَ بارَكَ اللهُ Ibn As-Sunni, p. 138, (no. 278). See also Ibn Al-Qayyim, Al-Wdbil As-Sayyib