In Psalm 63:3-5, David's lips praise God with joyful lips—the result of the opened lips he prays for in Psalm 51:15.

In Psalm 9:1, David vows to 'shew forth' God's works—the exact phrase used in Psalm 51:15 for praising with opened lips.

Psalm 9:14 also uses 'shew forth thy praise' — a vow to declare God's praise in Zion, echoing the same phrase.

Psalm 35:28 promises the tongue will speak of God's righteousness and praise all day — a fuller expression of the same commitment.

Psalm 71:8 asks that the mouth be filled with praise and honor all day — directly parallel to opening lips for praise.

In Psalm 119:13, David declares God's judgments with his lips—a similar use of lips for God's words, though here it's teaching rather than praise.

Psalm 19:14 prays for acceptable words from the mouth — a related but distinct focus on speech quality rather than praise.

In Hebrews 13:15, believers offer 'fruit of our lips'—praise to God—fulfilling the same idea of lips showing forth praise from Psalm 51:15.

In Ezekiel 29:21, God gives 'opening of the mouth' to Ezekiel—same phrase as David's request, showing God enables speech for His purposes.

In Ezekiel 3:27, God promises to open the prophet's mouth to speak His words—directly paralleling David's plea for opened lips to praise.

In Ezekiel 24:27, God opens the prophet's mouth after silence — a parallel to David's plea for opened lips to declare praise.

In Luke 1:64, Zechariah's mouth is opened and he praises God — a direct fulfillment of David's plea for opened lips to declare praise.

Ezekiel 3:26 shows God silencing a prophet — the opposite of David's plea for opened lips to praise.

In Exodus 4:11, God declares He makes mouths—affirming He alone can open lips for praise as David requests.

Isaiah 35:6 prophesies the tongue of the dumb will sing — God enabling praise from those previously unable.

In 1 Samuel 2:1, Hannah's mouth is enlarged in praise—a similar divine enablement for rejoicing, paralleling David's request for opened lips.

Matthew 12:22 shows Jesus healing a mute man — a demonstration of divine power to open lips, echoing David's plea.