Words of condolence

أَعْظَمَ اللهُ أَجْرَك،وَأحْسَنَ عَزَاءَك، وَغَفَر لِمَيتكَ

Atham Allahu Ajrak Wa Ahsana Azaak Wa Ghafara Limay-yatik

May Allah magnify your reward, Make better your solace and forgive your deceased.

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