Psalms 89:29 WEB

²⁷  I will also appoint him my firstborn, The highest of the kings of the earth.

²⁸  I will keep my loving kindness for him forevermore. My covenant will stand firm with him.

²⁹  I will also make his seed endure forever, And his throne as the days of heaven.

³⁰  If his children forsake my law, And don't walk in my ordinances;

³¹  If they break my statutes, And don't keep my commandments;