In Gethsemane, what did Jesus pray might pass from him if possible?

Answer: This cup

Jesus prayed, "My Father, if it is possible, let this cup pass from Me. Yet not as I will, but as You will."

“Going a little farther, He fell facedown and prayed, “My Father, if it is possible, let this cup pass from Me. Yet not as I will, but as You will.””— Matthew 26:39 (BSB)