Du'a to guide a father among the guided

اللَّهُمَّ اهْدِ أَبِي فِيمَنْ هَدَيْتَ، وَعَافِهِ فِيمَنْ عَافَيْتَ

Allahummahdi abi fiman hadayt, wa 'afihi fiman 'afayt

O Allah, guide my father among those You have guided, and grant him well-being among those You have granted well-being.

Adapted into the third person masculine from Sunan al-Tirmidhī 464.