Verses with the word shower in the Old Testament (3 verses):

Ezekiel 13:11
Say unto them which daub it with untempered morter, that it shall fall: there shall be an overflowing shower; and ye, O great hailstones, shall fall; and a stormy wind shall rend it.

Ezekiel 13:13
Therefore thus saith the Lord GOD; I will even rend it with a stormy wind in my fury; and there shall be an overflowing shower in mine anger, and great hailstones in my fury to consume it.

Ezekiel 34:26
And I will make them and the places round about my hill a blessing; and I will cause the shower to come down in his season; there shall be showers of blessing.