Hebrews 1:12 also declares Christ's unchanging nature, using the same 'you remain' language from Psalm 102.

Hebrews 7:24 explains that Jesus' permanent priesthood ensures his unchangeableness, directly supporting the statement in Hebrews 13:8.

Psalm 90:2 declares God's eternal nature, paralleling the statement that Jesus Christ is the same forever.

Revelation 1:18 proclaims Christ 'alive forevermore', directly supporting the 'for ever' statement in Hebrews 13:8.

Revelation 1:17 has Christ say 'I am the first and the last', affirming His eternal identity as in Hebrews 13:8.

Psalm 102:27 explicitly says God remains the same, directly underlying the assertion about Jesus Christ.

Isaiah 41:4 presents God as the same from first to last, echoing the unchanging nature attributed to Jesus Christ.

Revelation 1:11 repeats 'I am Alpha and Omega, the first and the last', matching the eternal Christ of Hebrews 13:8.

Isaiah 44:6 declares God as first and last, directly paralleling the eternal constancy of Christ in Hebrews 13:8.

Revelation 1:8 has Christ declaring 'I am Alpha and Omega' and 'who is and was and is to come', directly reinforcing Hebrews 13:8.

Revelation 1:4 describes God as 'Him who is and was and is to come', paralleling the eternal constancy of Christ in Hebrews 13:8.

Malachi 3:6 states God does not change, mirroring the unchanging nature of Christ proclaimed in Hebrews 13:8.

James 1:17 describes God as unchanging with no shadow of turning, echoing the same immutability attributed to Christ in Hebrews 13:8.

John 8:58 records Jesus claiming 'I AM' before Abraham, affirming His eternal existence consistent with Hebrews 13:8.

Philippians 2:6 describes Christ's pre-existent divine status — the 'yesterday' of Hebrews 13:8.

John 8:58 records Jesus' claim 'before Abraham was, I am' — the same eternal identity Hebrews 13:8 affirms.

Colossians 1:17 affirms Christ's preexistence and sustaining power, reinforcing the eternal constancy described in Hebrews 13:8.

Revelation 4:8 describes God as 'who was and is and is to come,' echoing the same eternal nature attributed to Christ in Hebrews 13:8.

2 Corinthians 1:19 states Christ is always 'Yes' — echoing His unchanging faithfulness in Hebrews 13:8.

Exodus 3:14 reveals God as 'I AM' — the eternal self-existent one. This provides the OT foundation for Jesus' unchanging nature.

John 1:15 testifies that Christ existed before John — reinforcing the 'yesterday' of Hebrews 13:8.

John 1:1 asserts Christ's pre-existence with God — the 'yesterday' of Hebrews 13:8 made explicit.

Habakkuk 1:12 affirms God's eternal existence — a direct parallel to the unchanging Christ in Hebrews 13:8.

Micah 5:2 foretells the Messiah's origins 'from everlasting' — echoing the same eternal constancy declared in Hebrews 13:8.

Isaiah 43:13 declares God is from eternity and none can reverse his work — a strong parallel to Jesus' unchanging power.

Psalm 102:12 says God's name endures to all generations, reinforcing the theme of unchanging identity.

Psalm 93:2 states God's throne is from everlasting, directly echoing the eternal constancy attributed to Jesus.

Psalm 9:7 says the Lord sits enthroned forever, paralleling Jesus' unchanging reign across time.

2 Corinthians 1:20 affirms Christ as the 'Yes' to all God's promises — consistent with His unchanging constancy.

Romans 16:26 describes the 'eternal God' — the same timelessness that Hebrews 13:8 attributes to Christ.

1 Timothy 6:16 emphasizes God's immortality and unapproachability, paralleling the unchanging nature of Christ in Hebrews 13:8.