From this mornings reading:

At a lodging place on the way, the LORD met {Moses} and was about to kill him. But Zipporah took a flint knife, cut off her son's foreskin and touched {Moses'} feet with it. "Surely you are a bridegroom of blood to me," she said. So the LORD let him alone. (At that time she said "bridegroom of blood," referring to circumcision.) - Exodus 4:24

This verse leaves me perplexed, why after sending Moses on his way to Egypt did he want to kill him? Wouldn't have been simpler to just tell Moses at the buring bush to circumcise his child? Why did Zipporah do it? Was Moses unwilling? Is that was it's about?

-Peace