Mass Healing Word

3rd-Level Abjuration Spell (Bard, Cleric)

Casting Time: Bonus Action
Range: 60 feet
Components: V
Duration: Instantaneous

Up to six creatures of your choice that you can see within range regain

Hit Points (HP) are a measure of how difficult it is to kill or destroy a creature or an object. Damage reduces Hit Points, and healing restores them. You can't have more Hit Points than your Hit Point maximum, and you can't have less than 0. See also Breaking Objects and Damage and Healing.

equal to 2d4 plus your spellcasting ability modifier.

At Higher Levels: The healing increases by 1d4 for each spell slot level above 3.

Source: Player's Handbook, p. 296