Adhkar reported as said after Salah are to be said only after the obligatory Salah

Q 4: Are the Adhkar (invocations) and Du`a' (supplication) recited after the Taslim (salutation of peace ending the Prayer) particular to the obligatory Salah (Prayer), or may be said after supererogatory Salah as well?

A: The Adhkar reported as said after Salah are to be said only after the obligatory Salah. There are no special Adhkar said after supererogatory Salah.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.