## our fathers ##

Paul is referring to the time of Moses in the book of Exodus when Israel fled through the Red Sea as the Egyptian army pursued them. "our" is Inclusive  AT: "the fathers of all Jews." (See: [[rc://en/ta/man/translate/figs-inclusive]])

## All were baptized into Moses ##

AT: "all followed and were committed to Moses"

## passed through the sea ##

They all crossed the Red Sea with Moses after leaving Egypt.

## in the cloud ##

by the cloud that led the Israelites during days, representing the presence of God.

## that rock was Christ ##

the "rock" represented the solid strength of Christ who was with them throughout their journey; they could depend on His protection and comfort. (See: [[rc://en/ta/man/translate/figs-metaphor]])