Lamentations 1:19 describes calling to allies who deceived and priests perishing, directly paralleling failed hope for help.

2 Kings 24:7 explains that Egypt could not come to help, providing the historical reason for the vain watching.

In Ezekiel 29:16, Egypt will no longer be a confidence for Israel — the very point of Lamentations' vain help.

In Ezekiel 29:7, the reed breaks and wounds those who lean on it — same imagery of failed help.

In Ezekiel 29:6, Egypt is called a staff of reed that breaks when leaned on — directly imagery of futile support.

In Jeremiah 37:7-10, God declares the Egyptian army will withdraw and Babylon will return — the vain help they watched for fails.

In Jeremiah 2:36, they are shamed by Egypt just as by Assyria — the pattern of trusting foreign powers.

In Jeremiah 2:18, the prophet asks why they go to Egypt to drink the Nile's waters — a rebuke of misplaced trust.

In Isaiah 31:1-3, the warning is explicit: Egypt is flesh, not spirit; those who rely on it fall.

In Isaiah 30:1-7, this same vain hope in Egypt is condemned as rebellion — trusting Pharaoh's shadow instead of God.

Isaiah 20:5 warns of shame from relying on Egypt, exactly the disappointed hope 'a nation that could not save'.

Jeremiah 14:19 echoes the same cry: 'We looked for peace, but no good came' — exactly the failed hope of help in Lamentations.

Ezekiel 7:25 says 'they will seek peace, but there shall be none' — the same futile search for help as in Lamentations.

Ezekiel 17:17 explicitly states Pharaoh will not help in war — directly explaining why the nation they watched for could not save.

Psalm 108:12 declares 'vain is the salvation of man' — directly echoes the vain hope in a nation that cannot save.

Psalm 119:123 has eyes failing for God's salvation — contrasting with Israel's failed hope in human help.

In 2 Kings 16:7, Ahaz seeks help from Assyria — same misplaced trust in a foreign nation instead of God.

In Jeremiah 8:20, the people lament that harvest is past and they are not saved — a similar cry of failed expectation, though not specifically about Egypt.