All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and messenger.
We know of no supplication that fits your description. Please, refer to Fataawa 45701 and 43607 about some of the good deeds whose rewards continue even after the doer’s death.
Allaah Knows best.