In Psalm 22:27, all families of nations worship God — expanding the theme of universal praise seen in the kings responding to God's word.

Psalm 72:11 envisions all kings bowing to God's king — directly echoing the universal royal praise in Psalm 138:4.

Psalm 102:15 says all kings will fear God's glory — the same vision of global royal worship.

In Psalm 67:4, the same call for all nations to praise God appears, echoing the universal kingship theme of Psalm 138:4.

Psalm 148:11 explicitly lists kings and rulers as called to praise the LORD, directly reinforcing the same audience in Psalm 138:4.

Isaiah 49:23 depicts kings bowing as foster parents to God's people — a specific outworking of kings praising God.

Isaiah 60:3-5 describes kings coming to Zion's light — a detailed fulfillment of the nations' tribute in Psalm 138:4.

Revelation 11:15 announces the kingdom of the world becoming Christ's — the ultimate fulfillment of all kings praising God.

Revelation 21:24 fulfills this vision: kings of the earth bring glory into the New Jerusalem.

In Judges 5:3, Deborah calls kings to hear as she sings to God — directly parallels the call for kings to praise in the main verse.

Isaiah 62:2 has kings seeing God's glory—a related outcome to their praise in Psalm 138:4, though here they observe rather than actively praise.

Zephaniah 2:11 shows all nations bowing to God—a parallel act of homage to the kings' praise in Psalm 138:4, with a different emphasis.