Psalm 18:2 earlier in the same psalm calls God a shield and refuge, which verse 30 echoes.

Psalm 12:6 uses the same 'flawless' description for God's words, comparing them to refined silver.

Psalm 19:7 calls God's law 'perfect' and 'sure' — parallel to His way being 'blameless' and His word 'tried', both affirming the flawless nature of God's revelation.

Psalm 84:11 calls God a shield and says he withholds no good from the blameless, similar to the shield for refugees.

Psalm 19:8-10 expands on the perfection of God's law, calling it radiant, pure, and more precious than gold.

Psalm 25:10 describes 'all the paths of the LORD' as lovingkindness and truth — similar to God's way being blameless, emphasizing the trustworthy character of His guidance.

Psalm 119:140 affirms that God's promises are thoroughly tested, echoing the flawless word theme.

Deuteronomy 32:4 proclaims God's work perfect and His ways just — directly parallel to 'His way is blameless', both extolling God's flawless character and actions.

2 Samuel 22:31 is the identical parallel passage — same wording about God's blameless way, tried word, and shield — reinforcing the exact same declaration.

Proverbs 30:5 repeats both the flawless word and the shield for those who take refuge, nearly verbatim.

Daniel 4:37 confesses God's ways are just and true — echoing the blameless way of God, as Nebuchadnezzar acknowledges God's righteous rule.