When Moses delayed on the mount, the people began worshipping the false idol. When he came down, the Levites were the only one who stood up on his side. A hard thing to stand on God's hand and to break one's connection with family and friends....all for the sake of God.
25And when Moses saw that the people were naked; (for Aaron had made them naked unto their shame among their enemies:) 26Then Moses stood in the gate of the camp, and said, Who is on the LORD'S side? let him come unto me. And all the sons of Levi gathered themselves together unto him. 27And he said unto them, Thus saith the LORD God of Israel, Put every man his sword by his side, andgo in and out from gate to gate throughout the camp, and slay every man his brother, and every man his companion, and every man his neighbour. 28And the children of Levi did according to the word of Moses: and there fell of the people that day about three thousand men. 29For Moses had said, Consecrate yourselves to day to the LORD, even every man upon his son, and upon his brother; that he may bestow upon you a blessing this day. Exodus 32:25-29
They will be divided, father against son and son against father, mother against daughter and daughter against mother, mother-in-law against daughter-in-law and daughter-in-law against mother-in-law." Luke 12:53
32Whosoever therefore shall confess me before men, him will I confess also before my Father which is in heaven. 33But whosoever shall deny me before men, him will I also deny before my Father which is in heaven.
34Think not that I am come to send peace on earth: I came not to send peace, but a sword. 35For I am come to set a man at variance against his father, and the daughter against her mother, and the daughter in law against her mother in law. 36And a man's foes shall bethey of his own household.
37He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. 38And he that taketh not his cross, and followeth after me, is not worthy of me. 39He that findeth his life shall lose it: and he that loseth his life for my sake shall find it.
40He that receiveth you receiveth me, and he that receiveth me receiveth him that sent me. 41He that receiveth a prophet in the name of a prophet shall receive a prophet's reward; and he that receiveth a righteous man in the name of a righteous man shall receive a righteous man's reward. 42And whosoever shall give to drink unto one of these little ones a cup of cold water only in the name of a disciple, verily I say unto you, he shall in no wise lose his reward. Matthew 10: 32-40