“Be ye angry, and sin not: let not the sun go down upon your wrath:”
King James Version (KJV)
4:26 Be ye angry, and sin not - That is, if ye are angry, take heed ye sin not. Anger at sin is not evil; but we should feel only pity to the sinner. If we are angry at the person, as well as the fault, we sin. And how hardly do we avoid it. Let not the sun go down upon your wrath - Reprove your brother, and be reconciled immediately. Lose not one day. A clear, express command. Reader, do you keep it?
Eph 4:26 Be ye angry, and sin not. Quoted from Ps 4:4, Septuagint Version. Do not sin through anger is the thought. If circumstance arouse your indignation, do not be led astray. Let not the sun go down upon your wrath. Let there be no long continuance of your wrathful mind.