Which animals did David say he had killed while protecting his father's sheep?

Answer: A lion and a bear

David told Saul that the LORD who saved him from the lion and the bear would also save him from Goliath.

“David replied, “Your servant has been tending his father’s sheep, and whenever a lion or a bear came and carried off a lamb from the flock,”— 1 Samuel 17:34 (BSB)