Where is the scripture that tells us to withdraw from an erring brother or sister?

The scripture that advises withdrawing from an erring brother or sister can be found in 2 Thessalonians 3:6, which states, "Now we command you, brethren, in the name of our Lord Jesus Christ, that you withdraw from every brother who walks disorderly and not according to the tradition which he received from us." Additionally, Matthew 18:15-17 outlines a process for addressing sin among believers, which can lead to withdrawal if the individual does not repent.