Hebrews 8:10, 13

“FOR THIS IS THE COVENANT THAT I WILL MAKE WITH THE HOUSE OF ISRAEL AFTER THOSE DAYS, SAYS THE LORD: I WILL IMPRINT MY LAWS UPON THEIR MINDS [even upon their innermost thoughts and understanding], AND ENGRAVE THEM UPON THEIR HEARTS [effecting their regeneration]. AND I WILL BE THEIR GOD, AND THEY SHALL BE MY PEOPLE.

When God speaks of “A new covenant,” He makes the first one obsolete. And whatever is becoming obsolete (out of use, annulled) and growing old is ready to disappear.