Numbers 13:20-24

And what the land is, whether it be fat or lean, whether there be wood therein, or not. And be ye of good courage, and bring of the fruit of the land. Now the time was the time of the firstripe grapes.

So they went up, and searched the land from the wilderness of Zin unto Rehob, as men come to Hamath.

And they ascended by the south, and came unto Hebron; where Ahiman, Sheshai, and Talmai, the children of Anak, were. (Now Hebron was built seven years before Zoan in Egypt.)

And they came unto the brook of Eshcol, and cut down from thence a branch with one cluster of grapes, and they bare it between two upon a staff; and they brought of the pomegranates, and of the figs.

The place was called the brook Eshcol, because of the cluster of grapes which the children of Israel cut down from thence.