Today's first reading warns the Hebrews not to be led astray by false prophets or bad relationships into worshiping a false god instead of the true God.
[links to Bible Gateway open in a new window]Reading the Bible in Its Entirety
The second selection continues this by reminding the people that any king over them will not have more authority than God.
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If you are planning to read the Bible in its entirety, you should read Deuteronomy 15-21 today.