Three times
2 Reis 13:18
And he said, Take the arrows. And he took them. And he said unto the king of Israel, Strike the ground. And he struck three times, and stopped.
2 Reis 13:19
And the man of God was angry with him, and said, You should have struck five or six times; then you would have struck down Syria till you had consumed it: whereas now you shall strike down Syria but three times.