necromancy 

Traditions arcane, divine, occult, primal

Cast [>>] somatic, verbal

Range touch; Targets 1 corpse

Duration until the next time you make your daily preparations

The targeted corpse doesn't decay, nor can it be transformed into an undead. If the corpse is subject to a spell that requires the corpse to have died within a certain amount of time (for example, raise dead), do not count the duration of gentle repose against that time. This spell also prevents ordinary bugs and pests (such as maggots) from consuming the body.

Heightened (5th) The spell's duration is unlimited, but the spell takes one more action to cast and requires a material component and a cost (embalming fluid worth 6 gp).

Core Rulebook, page 340.