Numbers 13:24
The place was called the brook Eshcol, because of the cluster of grapes which the children of Israel cut down from thence.
Cross-reference
Numbers 13:23
Historical context
Numbers 13:23 gives the event of cutting the cluster; 13:24 explains the naming of Eshcol from that cluster. A direct narrative explanation.
Numbers 13:20
Historical context
Numbers 13:20 contains Moses' instructions to spy out the land; 13:24 names the valley from the fruit they cut. Shows the result of their mission.
Hosea 9:10
Allusion
Hosea 9:10 uses 'grapes in the wilderness' and 'first fruit' — the very cluster that named Eshcol becomes a metaphor for Israel's early devotion.