Exodus 4:24-26

Young's Literal Translation

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;'

²⁶ and He desisteth from him: then she said, `A bridegroom of blood,' in reference to the circumcision.