Dua #1078•Ibn As-Sunni, p. 138, (no. 278). See also Ibn Al-Qayyim, Al-Wdbil As-Sayyib, p. 304, with checking by Basheer Muhammad ?Uyoon.

To someone who says "May Allah bless you"

Hisnul Muslim
#1078

وَفيكَ بارَكَ الله

Transliteration

Wafīka bārakallāh.

Translation

And may Allah bless you.