C. H. Mackintosh, in his Notes on the Pentateuch, discusses church discipline in his commentary on Numbers 5:3 - "that they defile not their camps, in the midst whereof...
Three Biblical Principles of Godly Dress
When Moses was distressed because of the greatness of the task of leading the children of Israel through the wilderness, God commanded him to gather seventy elders to help him carry the burden (Numbers 11:16). Moses gathered the seventy round about the tabernacle and the spirit that was on Moses rested on the seventy (Numbers 11:24-25).
On three different occasions the Apostle Paul admonishes believers to be followers of him (see 1Corinthians 4:6; 1Corinthians 11:1; and Philippians 3:17). With this in mind we ought to preach the gospel which Paul preached. We find this gospel defined in 1Corinthians 15:1-4, where it says the gospel includes the death, burial and resurrection according to the scriptures. Today we are taught by many of the necessity of baptism for salvation. Apparently Paul did not know this for he said, "For Christ sent me not to baptize, but to preach the gospel" (1Corinthians 1:17). Notice that Paul contradicted the gospel and baptism as if they were not the same. If Paul believed that baptism was necessary for salvation, then he was one of the biggest hypocrites ever to walk the face of this earth. He should have been going all over the countryside dunking people in water instead of wasting his time in prison for preaching the gospel.
The following is an excerpt from Soldiers in Training by Brother Daryl Coats.