PHB, page 248
Guidance
0-level (Cantrip) Divination
Casting Time: 1 action
Range/Area: Touch
Components: V, S
Duration: Concentration, up to 1 minute
You touch one willing creature. Once before the spell ends, the target can roll a d4 and add the number rolled to one ability check of its choice. It can roll the die before or after making the ability check. The spell then ends.
At higher levels: At 5th Level. You can cast this spell on a willing creature of your choice that you can see within 30 feet of you.
At 11th Level. When the target rolls a 1 for the benefit of this spell it may reroll the die and must use the new roll, even if the new roll is a 1.
At 17th Level. You can choose up to two creatures to receive the benefit of this spell. The spell ends when both targets have rolled, and each target may only roll once within its duration.
Available for: Cleric, Druid