(Player's Handbook v.3.5, p. 234)

Enchantment (Compulsion) [Language-Dependent, Mind-Affecting]
Level: Bard 6, Cleric 6, Sorcerer 6, Wizard 6, Wu Jen 6, Sha'ir 6, Dread Necromancer 6, Domination 6, Inquisition 6, Charm 6, Fate 6, Nobility 6, Tyranny 6,
Casting Time: 10 minutes
Target: One living creature
Saving Throw: None

This spell functions similarly to lesser geas, except that it affects a creature of any HD and allows no saving throw.
Instead of taking penalties to ability scores (as with lesser geas), the subject takes 3d6 points of damage each day it does not attempt to follow the geas/quest.
Additionally, each day it must make a Fortitude saving throw or become sickened.
These effects end 24 hours after the creature attempts to resume the geas/quest.
A remove curse spell ends a geas/quest spell only if its caster level is at least two higher than your caster level.
Break enchantment does not end a geas/quest, but limited wish, miracle, and wish do.
Bards, sorcerers, and wizards usually refer to this spell as geas, while clerics call the same spell quest.