Where does “وَالِدَیْن” come from?

وَالِدَیْن (Classical Persian) comes from Arabic وَالِدَيْن, from Arabic وَالِد.

Ancestry of “وَالِدَیْن”, step by step

Step	Language	Word	Meaning
1	Arabic	وَالِدَيْن	—
2	Arabic	وَالِد	—

وَالِدَیْن — Etymology, Origin & Word History | Etymology Explorer