Leviticus 19:26

"Ye shall not eat anything with the blood: neither shall ye use enchantments, nor practice augury. Ye shall not round the corners of your heads, neither shalt thou mar the corners of thy beard. Ye shall not make any cuttings in your flesh for the dead, nor print any marks upon you: I am Jehovah."

b. No pagan practices

"Not round the corners of your heads ..." Herodotus tells of the use of this type of haircut, forming what is called a tonsure, as the practice of pagan religious cults of ancient times who did so honoring one of their gods.[20] The cutting of one's flesh also characterized pagan worship as attested by the priests of Baal on Mount Carmel in the contest with Elijah. Tattooing was also a device of paganism. Certain gods had their logo inscribed upon their followers; and Paul made indirect mention of this in the Lord Jesus." At the time Paul wrote, the worshippers of pagan gods actually were literally branded with the symbol of their false deity. For example, "The mark of the pagan god Dionysius was that of an ivy leaf burned into the flesh with a branding iron."[21] However, as the beloved McGarvey put it, "The marks of Paul that branded him as a slave of Jesus were the deep cuts of the lictor's rods of Philippi and the stones of Lystra."[22] Christians generally disapprove of tattooing, despite the fact of the widespread use of it by many even today. In the light of what God says here, and in view of the history of it, it seems strange that anyone would pay someone else to tattoo him.