Final answer:
According to the biblical account, Moses parting the sea of reeds for the Israelites to cross happened during their exodus from Egypt.
Step-by-step explanation:
The biblical account of Moses parting the sea of reeds so that the Israelites could cross is found in the book of Exodus in the Bible. According to the account, this event took place during the Israelites' exodus from Egypt, after they had been enslaved by the pharaoh. Moses, under the guidance of God, stretched out his staff over the sea, and the waters were miraculously parted, allowing the Israelites to cross on dry land.