Basic Rules, pg. 275
Shield of Faith
1-level
Abjuration
Casting Time 1 bonus action
Range 60 ft.
Duration Concentration, up to 10 minutes
Components Verbal, Somatic, Material
Materials a small parchment with a bit of holy text written on it
A shimmering field appears and surrounds a creature of your choice within range, granting it a +2 bonus to AC for the duration.
Class(es): Cleric, Paladin