1 Thessalonians 4:2

"Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen."

"Son of man, I have made thee a watchman unto the house of Israel: therefore hear the word at my mouth, and give them warning from me."

"For even when we were with you, this we commanded you, that if any would not work, neither should he eat."

"To them that are without law, as without law, being not without law to God, but under the law to Christ, that I might gain them that are without law."

"Now we command you, brethren, in the name of our Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh disorderly, and not after the tradition which he received of us."