Exodus 4:23 YLT

²¹  And Jehovah saith unto Moses, 'In thy going to turn back to Egypt, see -- all the wonders which I have put in thy hand -- that thou hast done them before Pharaoh, and I -- I strengthen his heart, and he doth not send the people away;

²²  and thou hast said unto Pharaoh, Thus said Jehovah, My son, My first-born 'is' Israel,

²³  and I say unto thee, Send away My son, and he doth serve Me; and -- thou dost refuse to send him away -- lo, I am slaying thy son, thy first-born.'

²⁴  And it cometh to pass in the way, in a lodging place, that Jehovah meeteth him, and seeketh to put him to death;

²⁵  and Zipporah taketh a flint, and cutteth off the foreskin of her son, and causeth 'it' to touch his feet, and saith, 'Surely a bridegroom of blood 'art' thou to me;'