Hebrews 13:8 (BSB)

Jesus Christ is the same yesterday and today and forever.

From Hebrews 13. Also in the ESV.

Commentary on Hebrews 13:8

• John Calvin (Reformed), Calvin's Commentaries on Hebrews 13:8: 8. Jesus Christ the same, etc. The only way by which we can persevere in the right faith is to hold to the foundation, and not in the smallest degree to depart from it; for he who holds not to Christ knows nothing but mere vanity, though he may comprehend heaven and earth; for in Christ are included all the treasures of celestial wisdom.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Hebrews 13:1-17: The design of Christ in giving himself for us is that he may purchase to himself a peculiar people, zealous of good works. Now the apostle calls the believing Hebrews to the performance of many excellent duties, in which it becomes Christians to excel. I.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Hebrews 13:8: Jesus Christ, the same yesterday, and today, and for ever. Who is the substance of the word spoken by the above mentioned rulers, the author and object of their faith, and the end in which their conversation terminated. These words may be expressive of the duration of Christ: he was "yesterday", which does not design the day immediately foregoing, nor some little time past, but...
• Albert Barnes (Presbyterian), Barnes' New Testament Notes on Hebrews 13:8: Verse 8. Jesus Christ, the same yesterday, etc. As this stands in our common translation it conveys an idea which is not in the original. It would seem to mean that Jesus Christ, the unchangeable Saviour, was the end or aim of the conduct of those referred to, or that they lived to imitate and glorify him. But this is by no means the meaning in the original.