Aid

2nd-Level Abjuration Spell (Bard, Cleric, Druid, Paladin, Ranger)

Casting Time: Action
Range: 30 feet
Components: V, S, M (a strip of white cloth)
Duration: 8 hours

Choose up to three creatures within range. Each target's

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.

maximum and current

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.

increase by 5 for the duration.

At Higher Levels: Each target's

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.

increase by 5 for each spell slot level above 2.

Source: Player's Handbook, p. 239