They swear by God that they did not, yet they uttered the words of denial of truth after they had accepted Islam. They meditated a plot which they were unable to carry out, and being spiteful was their only response to God, who had enriched them out of His bounty, and to His Messenger. If they repent, it will indeed be better for them. If they turn away, God will punish them with grievous suffering in this world and the Hereafter, and there will be no one on earth to protect or help them.