A more thorough explanation:

in pace Dei et regis (in pay-see dee-I et ree-jis), adv. [Law Latin]

Historically, this phrase was used in an appeal from a murder conviction. It means "in the peace of God and the king."

Example 1: John was convicted of murder and sentenced to death. He appealed his conviction, saying that he was innocent. He ended his appeal by saying, "In pace Dei et regis."

Example 2: During the Middle Ages, people would often use this phrase to show that they were loyal to both God and the king. They believed that they were living in peace because they were following the laws of both.

The phrase "in pace Dei et regis" was used in legal appeals during the Middle Ages. It was a way for people to show that they were loyal to both God and the king. By saying this phrase, they were saying that they were living in peace because they were following the laws of both. The examples illustrate how the phrase was used in legal appeals and how it was used to show loyalty to both God and the king.