SPELL_BLESS

Usage       : cast bless <victim or object>
Accumulative: No
Duration    : (6 + caster's level) ticks, permanent for objects.
Level       : Level 5 cleric
Mana Usage  : 5

Bless on a victim will improve the victims saving throw versus spells
by 1, and furthermore improve the hitroll by 5.

Bless on an item currently has no defined action. It is only possible
to bless non-evil items, and the object blessed may weigh no more
than five stones per level of caster.