King Herod existed during the Jesus’ birth. When he heard that a King is born he passed the draconian decree to kill all the male children.

As an idiom it means a Cruel Person.

Example: Stalin was a Herod when he put a large number of people to death during the great purges.

Hitler was a Herod as he tormented and put to death a large number of the Jewish people.

I am not a Herod.

Crossing the Red Sea

Crossing the Red Sea comes from the Old Testament Bible where God parted the Red Sea so that the Israelites can escape the Pharaoh’s army.

As an idiom it can refer to the providence of God during difficult times.

Example: When my son was near to death due to Pancreatitis, I to my surprise experienced crossing the Dead Sea.

The provision of Grace and Mercy of God is crossing the Red Sea.

When there were debts in the family, grandfather’s timely help was crossing the Red Sea.