Sweep allows a character to make a single Fighting attack and apply it against all currently adjacent targets at a -2 penalty (friends and foes alike–be careful). Resolve each damage roll separately. The attack is applied immediately when rolled and only affects targets adjacent at that time.

A character may not use Sweep in the same round she uses Frenzy, nor may she Sweep more than once per round, or with a second weapon held in another hand. In effect, the hero may only perform Sweep once per action unless she somehow gets two entire actions (perhaps under the effects of a spell or power, for example).

Savage Worlds Deluxe Edition p. 39