“We cannot go on hating another man in the presence of God. The surest way of killing bitterness is to pray for the man we are tempted to hate.” - Barclay
In Matthew 5:43-45 , Jesus says, “You have heard that it was said, 'You shall love your neighbor and hate your enemy.' But I say to you, love your enemies and pray for those who persecute you, so that you may be sons of your Father in Heaven; for He causes His sun to rise on the evil and the good, and sends rain on the righteous and the unrighteous.”