Numbers 13:23

13:23 When they came to the valley of Eshcol, they cut down from there a branch with one cluster of grapes, and they carried it on a staff between two men, as well as some of the pomegranates and the figs.

tn The word is related etymologically to the verb for “slip, slide, bend, totter.” This would fit the use very well. A pole that would not bend would be hard to use to carry things, but a pole or stave that was flexible would serve well.