Nehemiah 4:10
And Judah said, The strength of the bearers of burdens is decayed, and there is much rubbish; so that we are not able to build the wall.
Cross-reference
Nehemiah 4:2 records Sanballat mocking the Jews' feeble efforts and rubble—the people's own complaint here repeats his exact accusations, highlighting internalized doubt.
In Nehemiah 4:17, the workers respond to the discouragement by carrying weapons while building — a practical solution to the threat.
In Nehemiah 6:9, the same intimidation tactic is met with prayer for strength, contrasting the earlier complaint.
Numbers 13:31 records the spies' defeatist report that enemies are too strong—a direct parallel to the people's complaint here that they are too weak to rebuild.
Numbers 32:9 describes how the spies discouraged Israel from entering the land—mirroring the discouragement among Nehemiah's workers that threatens God's project.