1 Corinthians 3:23 ~ And ye are Christ’s; and Christ is God’s.
Circumstances under which a believer can be damned in the flesh :
1 Let every soul be subject unto the higher powers. For there is no power but of God: the powers that be are ordained of God.
2 Whosoever therefore resisteth the power, resisteth the ordinance of God: and they that resist shall receive to themselves damnation.
1 Corinthians 5:5
5 To deliver such an one unto Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.
But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.