"When they do not preach the true Word of God. in love."
You're somewhat correct Lupe. 2 John 1:10 is the answer to the question I posed, but it does not end with "in love", as you included.
(2Jn 1:10) If there come anyG1536 G2064 untoG4314 you,G5209 andG2532 bringG5342 notG3756 thisG5026 doctrine,G1322 receiveG2983 himG846 notG3361 intoG1519 your house,G3614 neitherG2532 G3361 bidG3004 himG846 God speed:G5463
In other words, if someone comes to us and we point out the clear and evident truths of the Gospel, and they reject them, then we are no longer obligated to welcome them.
(2Jn 1:10-11) If anyone comes to you and does not bear this doctrine, do not receive him into the house, and do not speak a greeting to him. For the one speaking a greeting shares in his evil works.