2 John 1 10
Someone may come to you and teach you something that is different. Do not receive that person into your house. Do not receive him as a Christian.
Compare with other 3 random translations
KJV 2 John 1:10If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God-speed:
CSB 2 John 1:10If anyone comes to you and does not bring this teaching, do not receive him into your home, and do not greet him;
AMP 2 John 1:10If anyone comes to you and does not bring this doctrine [is disloyal to what Jesus Christ taught], do not receive him [do not accept him, do not welcome or admit him] into [your] house or bid him Godspeed or give him any encouragement.