23 “When Moses was forty years old, he decided to visit his own people, the Israelites.

Read Acts 7:23 Using Other Translations

And when he was full forty years old, it came into his heart to visit his brethren the children of Israel.
"When he was forty years old, it came into his heart to visit his brothers, the children of Israel.
“One day when Moses was forty years old, he decided to visit his relatives, the people of Israel.