Unarm Foe

This spell allows you to attempt to disarm a creature with a minor blast of force. Your target must make a STR saving throw against your spell DC or the targeted object falls to the ground at the defender’s feet. 

At Higher Levels: At 5th level you can target 2 creatures, at 11th you can target 3 creatures, and at 17th you can target 4 creatures. 

Source: 1001 Spells: Pathfinder Spell Compendium