Warding Smite

5th-level abjuration
Casting time: 1 bonus action
Range: Self
Target: A creature you hit with your melee attack
Components: V
Duration: Concentration, up to 1 minute
Classes: Paladin
Subclasses:

The next time you hit a creature with a weapon attack before this spell ends, your weapon flashes with celestial power before enveloping you in a protective aegis. The attack deals an extra 5d8 radiant damage and you gain an equal number of temporary hit points. While you have temporary hit points from this spell, you have resistance to all damage. You lose all remaining temporary hit points from this spell when this spell ends.