Psalm 73:3 gives the reason for the embittered heart in verse 21 — envy at the prosperity of the wicked.

Psalm 37:1 warns against envying evildoers — directly addressing the same struggle that caused the psalmist's embittered heart in Psalm 73:21.

Psalm 37:7 counsels patient trust instead of fretting over the wicked — the antidote to the embittered heart described in Psalm 73:21.

In Psalm 16:7, the heart is instructed by God at night — contrasting with the psalmist's embittered heart that led him astray.

In Lamentations 3:13, God's arrows pierce the heart — directly echoing the psalmist's grieved and embittered spirit here.

In Job 16:13, the imagery of God piercing the kidneys parallels the psalmist's embittered heart — both depict deep internal anguish.