Du'a for a father's long life

اللَّهُمَّ أَمْدِدْ فِي عُمْرِ أَبِي بِالصِّحَّةِ وَالْعَافِيَةِ فِي طَاعَتِكَ وَرِضَاكَ

Allahumma amdid fi 'umri abi bis-sihhati wal-'afiyati fi ta'atika wa ridak

O Allah, extend my father's life with health and well-being in Your obedience and pleasure.

A general supplication, not a narration from the Prophet (peace be upon him).