They swear by God that they have never said such and such thing and they are lying. They have returned back to disbelief as they did not find the belief accommodating. They have rebelled in spite of the fact that God and His Messenger showered them with the Lord’s grace and material provisions. If they repent even now, there is still hope for them. If they do not come to their senses and do not repent, then God will punish them severely in this world and in the Hereafter and no power on the earth can come to their help.