Mark 13:31

Heaven and earth will pass away, but My words will by no means pass away.

Surrounding context

13:30 Assuredly, I say to you, this generation will by no means pass away till all these things take place.

13:31 Heaven and earth will pass away, but My words will by no means pass away.

13:32 "But of that day and hour no one knows, not even the angels in heaven, nor the Son, but only the Father.

Translation and sources