Matthew Poole and continuators on Proverbs 30:6

6 Add thou not unto his words , lest he reprove thee , and thou be found a liar.

And as the Word of God is pure, do not thou corrupt or abuse it, by adding to it thine own or other mens inventions and opinions, and delivering or receiving of them in the Name and as the Words of God. He here forbids onely adding to it, not diminishing from it, which yet is equally forbidden, Deut. 4. 2. & 12. 32. because the Israelites then and always were, and others are more prone to add than to diminish, because it is more easy to add under colour of interpreting, and because it is more agreeable to the humour of Mankind which is much delighted with its own inventions, as the experience of all Ages sheweth.

By words or deeds, by discovering thy folly and bringing thee to deserved shame and punishment.

Marginal references: Rev. 22. 18. 19.