Which hand should be raised to cover the mouth when yawning?

Yawning is disliked both within and outside of prayer. It is recommended to suppress and restrain it as much as possible, by closing the lips. If one is unable to do so, then by placing a hand over the mouth to prevent the entry of Satan. Some scholars have recommended using the back of the left hand to ward off Satan, while others hold that the matter is broad, and the Sunnah is achieved by placing either the right or left hand.