Exodus 4:24-26 (New Century Version):
24 As Moses was on his way to Egypt, he stopped at a resting place for the night. The Lord met him there and tried to kill him. 25 But Zipporah took a flint knife and circumcised her son. Taking the skin, she touched Moses’ feet with it and said to him, “You are a bridegroom of blood to me.” 26 She said, “You are a bridegroom of blood,” because she had to circumcise her son. So the Lord let Moses alone.
Out of nowhere, while Moses is resting for the night God shows up and tries to kill him. The following verses imply that God was angry at Moses for not circumcising his son, but it’s never mentioned before this. His wife Zipporah seems to know that God is killing Moses because their son is uncircumcised, and does impromptu surgery which seems to satisfy Yahweh who leaves them alone and doesn’t kill anyone in the end.
To me the emotional crux of this passage is Zipporah’s reaction, which implies that she had wanted to avoid circumcision for her son, and she’s mad at Moses for forcing her to do it. She calls him “bridegroom of blood” which was probably a sounded better in the original language.
There are a lot of scenes in Exodus, Numbers and Deuteronomy where Yahweh suddenly gets really angry and kills one or many of the Hebrews with little to no explanation or warning, but this is a rare one where he tries to kill the main character. It’s interesting how passages like this were maintained in the Bible despite making God look pretty terrible from just about any vantage point.
Here’s another analysis of this passage that I pretty much agree with (though the author is probably coming from a very different perspective than me).
I kind of wish this scene had made it into the movie.