'Ensure' in the Bible

Only be strong and very courageous to ensure that you obey all the instructions that my servant Moses gave you turn neither to the right nor to the left from it so that you may succeed wherever you go.

As the Sabbath approached and it began to get dark at the gates of Jerusalem, I gave word to shut the gates, charging that they should not be opened until after the Sabbath. I stationed some of my men at the gates to ensure that no loads would be brought in on the Sabbath day.