5:73They disbelieve those who say, “God is the third of three.” But there is no deity except the One God. If they do not refrain from what they say, a painful torment will befall those among them who disbelieve.

5:89God does not hold you accountable for your unintended oaths, but He holds you accountable for your binding oaths. The atonement for it is by feeding ten needy people from the average of what you feed your families, or by clothing them, or by freeing a slave. Anyone who lacks the means shall fast for three days. That is the atonement for breaking your oaths when you have sworn them. So keep your oaths. Thus God makes clear His Revelations to you, that you may be grateful.