Elohim do not sleep, unless spiritually induced. They do benefit from restful peace, however.
An elohim's Endurance recovers at a rate of 1/7th of their natural maximum each Day.
If they are at rest for the entire Day (no War), Endurance recovers at a rate of 1/3rd of their natural maximum each Day.
Resolve and Passion recover more quickly at a rate of 1/12th their natural maximum each hour they are at peace (outside of War).