In 1 Thessalonians 2:12, Paul reminds of God's calling into His kingdom, which the faithful God will complete.

Micah 7:20 recalls God's faithfulness to His covenant oath to the patriarchs, the same faithful character that ensures He will fulfill His calling on believers.

In 1 Peter 5:10, the same God who calls also restores and strengthens — a parallel promise of divine completion after suffering.

In 2 Timothy 2:13, the same truth is echoed: even when we are faithless, God remains faithful — reinforcing the reliability of the one who calls.

2 Thessalonians 3:3 declares 'the Lord is faithful; he will establish you,' directly echoing the promise that He will do what He has called us to.

1 Corinthians 10:13 affirms God's faithfulness in providing a way of escape from temptation, a specific example of His trustworthiness to act on behalf of His people.

1 Corinthians 1:9 directly states 'God is faithful, by whom you were called,' providing the same assurance that the calling God will complete His work.

In Romans 8:30, the chain of calling, justification, and glorification shows God's faithfulness to finish what He starts.

Numbers 23:19 affirms God does not lie and always fulfills His word — the very reliability that underlies the promise here.

Lamentations 3:23 proclaims 'great is your faithfulness,' underscoring the consistent reliability of God that undergirds His promise to act.

In Isaiah 25:1, God's plans are described as 'faithful and sure,' affirming that the One who calls us is trustworthy to bring His purposes to completion.

Isaiah 14:24-26 shows God's purpose stands unalterably — reinforcing the certainty that He will accomplish what He says.

Psalm 146:6 declares that God keeps faith forever, directly reinforcing the promise that the faithful God who calls will accomplish His purpose.

Psalm 138:2 praises God for exalting His name and word, highlighting His steadfast faithfulness — the same reliability that guarantees He will do what He has called us to.

Psalm 138:8 directly affirms that the Lord will fulfill His purpose and not forsake the work of His hands.

Hebrews 10:23 anchors hope in God's faithfulness to His promises — the same reason for confidence in His action.

Joshua 21:45 confirms God's faithfulness to fulfill every promise — the same assurance that He will do what He has said.

Philippians 1:6 is the classic parallel: He who began a good work will bring it to completion — identical promise.

1 Corinthians 1:8 promises God will sustain believers to the end, mirroring the assurance that He will surely do it.

In 2 Thessalonians 2:14, God calls through the gospel to share glory, which the faithful God will accomplish.

Psalm 89:2 establishes God's faithfulness forever, echoing the certainty behind Paul's statement that God will do it.

Psalm 86:15 describes God as abounding in steadfast love and faithfulness, supporting Paul's confidence in God's faithful call.

Psalm 92:2 declares God's faithfulness nightly, the same faithfulness Paul relies on for God's completing work.

Psalm 40:10 proclaims God's faithfulness openly, which Paul trusts for the completion of sanctification.

Psalm 36:5 extols God's faithfulness to the clouds, reinforcing the basis for Paul's confidence that God will keep His promise.

Matthew 24:35 affirms Jesus' words never pass away — underpinning the reliability of God's promise to do what He said.

In Titus 1:2, God is described as one who does not lie, which underpins His faithfulness to do what He promises.

In Hebrews 6:17, God's unchanging purpose and oath confirm His faithfulness, similar to the assurance here.

In Hebrews 6:18, God's impossibility to lie gives strong encouragement, aligning with the faithful promise here.

Psalm 92:2 declares God's faithfulness nightly, the same faithfulness Paul relies on for God's completing work.

Deuteronomy 7:9 declares God's faithfulness to His covenant, grounding Paul's assurance that God will complete His work.