Verses with the word rush in the Old Testament (4 verses):

Job 8:11
Can the rush grow up without mire? can the flag grow without water?

Isaiah 9:14
Therefore the LORD will cut off from Israel head and tail, branch and rush, in one day.

Isaiah 17:13
The nations shall rush like the rushing of many waters: but God shall rebuke them, and they shall flee far off, and shall be chased as the chaff of the mountains before the wind, and like a rolling thing before the whirlwind.

Isaiah 19:15
Neither shall there be any work for Egypt, which the head or tail, branch or rush, may do.