Exodus 32:29

For Moses had said, before the men of Levi went forth to the slaughter, Consecrate yourselves today to the Lord, even every man upon his son and upon his brother, that He may bestow upon you a blessing this day. They were to dedicate themselves to the Lord by this implicit and unquestioning obedience, which disregarded the ties of even the closest relationship in order to secure the blessing of the Lord. For the Christians also it often becomes necessary to deny the nearest relatives, namely, when the alternative is Christ or the world. Obedience toward our Lord must always be the first consideration.