Psalm 71:9-13 prays for enemies to be put to shame and for God's help — a very close parallel to the request here.

Psalm 74:9 laments the absence of signs — a direct contrast to the request for a sign of favor here.

Psalm 109:29 asks for accusers to be clothed with dishonor — directly parallels the desire for enemies to be put to shame.

In Psalm 6:10, David declares enemies will be put to shame — a direct parallel to the shame of enemies in Psalm 86:17.

In Psalm 41:11, David knows God delights in him because his enemy won't triumph — a similar link between God's favor and enemy's defeat.

Micah 7:8-10 describes the enemy seeing God's vindication and being ashamed — a strong parallel to the sign and shame here.

In Judges 6:17, Gideon asks for a sign of favor — a direct parallel to David's request for a sign.

In Genesis 15:8, Abram asks for a sign to confirm God's promise — a parallel request for a divine sign.

In Exodus 3:12, God gives Moses a sign of His presence — a parallel example of God providing a sign.

In Isaiah 38:22, Hezekiah asks for a sign of healing — both are requests for a sign of God's favor, though different contexts.