ISB ~ 2 John 1 v10

into the house:A house church used for Christian assembly. Private homes were a common venue for fellowship, catechesis, and liturgy in apostolic times (Acts 2:46; 1 Cor 16:19). John wants to block deceivers (2 Jn 7) from gaining admittance to these gatherings and disseminating their errors. Hospitality could prove harmful in this extreme situation.