In John 3:32, Jesus testifies but few receive it — immediately sets up the contrast with those who do receive and set their seal here.

John 17:8 shows disciples receiving Jesus' words and believing he came from God — mirroring the sealing of God's truth here.

Romans 3:4 explicitly declares 'Let God be true though every man a liar,' directly supporting the truthfulness that believers seal in John 3:33.

Titus 1:2 states God never lies, directly reinforcing the truth of God that believers seal when they receive Christ's testimony.

In 1 John 5:9, God's testimony is greater than human testimony — echoes the same theme of receiving divine witness and affirming God's truth.

In 1 John 5:10, rejecting God's testimony makes Him a liar — contrasts with the seal of belief here that affirms God is true.

In Psalm 19:7, the testimony of the Lord is sure — parallels the declaration that God is true when His testimony is received.

Romans 4:18-21 describes Abraham fully convinced God would fulfill His promise, exemplifying how one sets a seal that God is true.

2 Corinthians 1:18 affirms God's faithfulness, aligning with the truthfulness of God that believers seal by receiving testimony.