Be sharpened! Go to the right or to the left, whichever way is the desire of your face
Other versions
King James Version
Go thee one way or other, either on the right hand, or on the left, whithersoever thy face is set. English Standard Version
Cut sharply to the right; set yourself to the left, wherever your face is directed.New International Version
O sword, slash to the right, then to the left, wherever your blade is turned.