Psalm 4:6 asks for the light of God's countenance — the same phrase used here for walking in His favor.

Psalm 98:4-6 explicitly calls for joyful noise with trumpets and cornet, directly echoing the 'joyful sound' of Psalm 89:15.

Psalm 144:15 declares happy the people whose God is the Lord, paralleling the blessedness of those who know the joyful sound.

Proverbs 16:15 says the king's countenance brings life — mirroring the light of God's countenance here.

Isaiah 2:5 calls Israel to walk in the light of the LORD — a direct parallel to walking in the light of His countenance.

Acts 2:28 (quoting Psalm 16) speaks of joy in God's countenance — directly linking joy and His face as here.

Isaiah 27:13 depicts a great trumpet gathering exiles to worship — the same 'joyful sound' (teruah) as in the psalm.

1 John 1:7 uses 'walk in the light' — directly echoing the psalm's 'walk in the light of your countenance'.

Revelation 11:15 has a trumpet sound announcing God's reign — parallel to the joyful trumpet sound in the psalm.

Numbers 6:26 blesses with God's countenance lifted up — a parallel to walking in the light of His face.

Job 29:3 recalls walking by God's light through darkness — similar imagery of walking in divine illumination.