This is the law of him that hath an issue, and of him whose seed goeth from him ... And of her that is sick of her flowers, and of him that hath an issue, of the man, and of the woman, and of him that lieth with her that is unclean. 15:32
God killed Aaron's sons by burning them to death and then told Aaron not to mourn them. This was used in a Watchtower video as an example for parents to shun their disfellowshipped children. (The video has since been deleted at JW.org do to a lawsuit in Norway addressing the shunning of disfellowshipped children by their parents.)
10:6