Isaiah 55:3 promises an everlasting covenant, reinforcing the enduring nature of the covenant mentioned here.

In Isaiah 51:16, God puts His words in the mouth of His servant and covers him — the same covenant imagery of Spirit and words is echoed here within Isaiah.

Isaiah 49:8 describes the Servant as a covenant for the people, directly paralleling the covenant promise of Spirit and words in this verse.

In Isaiah 44:3, God pours His Spirit on descendants—directly matching the promise of the Spirit on offspring in 59:21.

In Isaiah 11:2, the Spirit rests on the Messiah—the same Spirit promised to remain on God's people forever in 59:21.

In Isaiah 42:1, God puts His Spirit on His servant, paralleling the perpetual Spirit on the covenant community in 59:21.

Isaiah 61:1-3 depicts the Spirit upon the anointed herald, prefiguring the fulfillment of the covenant Spirit that will not depart.

Isaiah 11:1-3 shows the Spirit resting on the Messiah, a specific embodiment of the abiding Spirit promised to the covenant community.

Ezekiel 37:25-27 reaffirms the everlasting covenant with God's sanctuary among them, aligning with the enduring covenant here.

Jeremiah 32:38-41 speaks of an everlasting covenant with one heart and God's presence, mirroring the permanent Spirit and words.

Ezekiel 39:25-29 speaks of God pouring out His Spirit on Israel, a direct parallel to the abiding Spirit in this covenant promise.

John 1:33 identifies Jesus as the one on whom the Spirit remains, fulfilling the promise of an abiding Spirit in this covenant.

In John 3:34, Jesus is the one sent by God who speaks God's words and has the Spirit without measure — directly fulfilling the covenant promise of Spirit and words never departing.

In John 7:39, the Spirit is given after Jesus is glorified — this is the historical fulfillment of the covenant that the Spirit would be upon believers and their descendants.

John 17:8 shows Jesus giving the disciples the words the Father gave Him, directly paralleling God's promise of words not departing from the mouth in Isaiah 59:21.

In Romans 8:9, having the Spirit dwelling in you is the mark of belonging to Christ — this indwelling corresponds to the covenant promise of the Spirit never departing.

Hebrews 8:6-13 presents the new covenant in Christ, fulfilling the promise of an everlasting covenant with God's Spirit and words.

Hebrews 10:16 quotes the new covenant promise of laws on hearts, echoing the internalized word and Spirit from this passage.

Jeremiah 31:31-34 promises a new covenant with God's law written on hearts, echoing the enduring word and Spirit promised here.

Ezekiel 36:25-27 describes God giving a new heart and putting His Spirit within, directly paralleling the covenant Spirit that never departs.

Psalm 89:29 declares the Davidic line established forever, paralleling the perpetual covenant promise for descendants in Isaiah.

Exodus 13:9 speaks of the law being in your mouth as a sign, matching the phrase 'my words in your mouth' from Isaiah 59:21.

Numbers 11:17 describes God putting the Spirit on elders, echoing 'my Spirit who is on you' in Isaiah 59:21.

Numbers 23:5 says the Lord put a word in Balaam's mouth, directly parallel to 'my words in your mouth' in Isaiah 59:21.

Deuteronomy 31:19 instructs putting the song in the people's mouths so it doesn't depart, mirroring the promise in Isaiah 59:21.

Joshua 1:8 says the Book of the Law shall not depart from your mouth, identical phrasing to 'will not depart from your mouth' in Isaiah 59:21.

In Matthew 3:11, John announces Jesus will baptize with the Holy Spirit—fulfilling the promise of the Spirit's permanent presence in 59:21.

In Ezekiel 39:29, God pours out His Spirit on Israel—the same outpouring that 59:21 says will never depart.

Exodus 4:15 has God putting words in Moses' and Aaron's mouths, the same idiom as 'my words in your mouth' in Isaiah 59:21.

In Ezekiel 36:27, God puts His Spirit within to enable obedience—identical to 59:21's permanent indwelling Spirit for the covenant.

In Luke 4:18, Jesus declares the Spirit of the Lord is upon him, mirroring the promise of the Spirit's abiding presence in Isaiah 59:21.

In Matthew 12:18, the Spirit is placed on God's chosen servant, echoing the same Spirit-empowerment theme from Isaiah 59:21's covenant promise.

1 Corinthians 2:10 reveals that the Spirit discloses God's hidden wisdom — echoing Isaiah's promise of the Spirit and words put in the mouth.

1 Corinthians 12:8 describes the Spirit giving utterance of wisdom and knowledge — paralleling God putting words in the mouth in Isaiah 59:21.

2 Kings 2:15 shows the Spirit of Elijah resting on Elisha, echoing the enduring Spirit promised in the covenant.