Psalm 119:152
"Concerning thy testimonies, I have known of old that thou hast founded them for ever."
Cross References (ranked by relevance)
Luke 21:33
Heaven and earth shall pass away: but my words shall not pass away.
Ecclesiastes 3:14
I know that, whatsoever God doeth, it shall be for ever: nothing can be put to it, nor any thing taken from it: and God doeth it, that men should fear before him.
Psalm 119:160
Thy word is true from the beginning: and every one of thy righteous judgments endureth for ever.
Psalm 119:144
The righteousness of thy testimonies is everlasting: give me understanding, and I shall live.