Romans 11:20-22

20That is true. They were broken off because of their unbelief, but you stand fast through faith. So do not become proud, but fear.

21For if God did not spare the natural branches, neither will he spare you.

22Note then the kindness and the severity of God: severity toward those who have fallen, but God's kindness to you, provided you continue in his kindness. Otherwise you too will be cut off.