Source: Player's Handbook

Level 1 Abjuration (Bard, Cleric, Druid, Paladin, Ranger)

Casting Time: Action
Range: Touch
Components: V, S
Duration: Instantaneous

A creature you touch regains a number of Hit Points equal to 2d8 plus your spellcasting ability modifier.

Using a Higher-Level Spell Slot. The healing increases by 2d8 for each spell slot level above 1.