Granted Powers: You can perform a feat of strength as a supernatural ability. You gain an enhancement bonus to Strength equal to your cleric level. Activating the power is a free action, the power lasts 1 round, and it is usable once per day.
Source: Player's Handbook v3.5, pg. 188
Strength Domain Spells
1 Enlarge Person: Humanoid creature doubles in size.
2 Bull’s Strength: Subject gains +4 to Str for 1 min./level.
3 Magic Vestment: Armor or shield gains +1 enhancement per four levels.
4 Spell Immunity: Subject is immune to one spell per four levels.
5 Righteous Might: Your size increases, and you gain combat bonuses.
6 Stoneskin M: Ignore 10 points of damage per attack.
7 Bigby’s Grasping Hand: Large hand provides cover, pushes, or grapples. or
Stoneskin, Greater M: Ignore 20 points of damage per attack.
8 Bigby’s Clenched Fist: Large hand provides cover, pushes, or attacks your foes.
9 Bigby’s Crushing Hand: Large hand provides cover, pushes, or crushes your foes.