Isasle Thawaab for Rasulullaah (SAW.) Parents

Q: Imaan- 14 : Can one make du'aa or send Isaale Thawaab for Rasuluilaah(SAW.) parents (do good deeds on their behalf)?

Answer: While some scholars say that this is permissible. others say that it is not. The issue is delicate and the differences are vast. And Allaah knows best what is most correct.

Fatawa Rahimiyyah vol.1

?