Rashi on Numbers
זמורה (lit., AND THEY CUT DOWN FROM THENCE) A BRANCH [AND ONE CLUSTER OF GRAPES] — i.e. a vine branch with a cluster of grapes hanging from it (not as the text might suggest, that they cut a branch and they cut also a cluster of grapes),
Rabbeinu Bahya
Siftei Chakhamim
With a cluster of grapes hanging from it. [The meaning is] as if Scripture had written “from there they cut off a branch with one cluster of grapes” rather than interpreting [that they cut off] “a branch” by itself and a “cluster” by itself; for if so why would they have cut off the branch at all, since it had no fruit.