Invocation for someone who tells you: "May Allah bless you."

204. Wafeekabaarakallaahu.

And may Allah bless you.

Reference: Ibn As-Sunni, p. 138, (no. 278). See also Ibn Al-Qayyim, Al-Wdbil As-Sayyib, p. 304, with checking by Basheer Muhammad ‘Uyoon.