Hibernate

With a wave of your hand, a willing creature of your choice that you can see within range falls unconscious for the spell’s duration. The spell ends on a target early if it takes damage or someone uses an action to shake or slap it awake. If a target remains unconscious for the full duration that target gains the immediate benefits of a long rest and it can’t be affected by this spell again until it finishes its next natural long rest.

If you target yourself with this spell, you do not recover the spell slot used to cast it.

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, you can target one additional creature for each spell levels above 6th.

Clarified you only get immediate benefits of a long rest, and added restriction where it does not recover the spell slot used if used on oneself.