4th-Level Abjuration
Casting Time: 1 action
Range: Touch
Components: VSM($) (powdered silver worth at least 50 gp, which the spell consumes)
Duration: 8 hours

You imbue up to three creatures with protection against weariness, granting them advantage on any saving throws made to resist gaining levels of fatigue or stress.
At Higher Levels. When you cast this spell using a spell slot of 5th level or higher level, you can target one additional creature for each slot level above 4th.

Source: Knuckleheads & Other Such Curiosities: A Travelers’ Guide to Icewind Dale