Bless

1st-level Enchantment Spell (Concentration)

Casting Time: 1 action
Range: 30 feet
Components: V, S, M (a sprinkling of holy water)
Duration: 1 minute (concentration)

You bless up to three creatures of your choice within range. Whenever a target makes an attack roll or a saving throw before the spell ends, the target can roll a d4 and add the number rolled to the attack roll or saving throw.

At Higher Levels

When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st.

Source: Player's Handbook (2014)