Mantle of Dreams (HB)

When you cast this spell, the pores of your skin begin to emanate a soporific fragrance that causes living creatures of your choice in a 20-foot Emanation centered on you to fall into slumber. Each creature that enters the area affected by the spell for the first time during its turn or starts its turn there must make a Constitution saving throw. On a success, whenever the creature makes a D20 Test until the start of your next turn, it must roll a d4 and subtract the number rolled from the result, as it becomes weary from drowsiness. On a failed save, the creature falls asleep and is Unconscious until the spell ends, the sleeper takes damage, or someone uses an Action to shake or slap the sleeper awake. Undead and creatures immune to being Charmed aren't affected by this spell.

Using a Higher-Level Spell Slot: The range increases by 5 feet for each spell slot level above 3. Using a spell slot level of 5 or higher grants a duration that doesn't require you to maintain Concentration.