Verses with the word willows in the Old Testament (5 verses):

Leviticus 23:40
And ye shall take you on the first day the boughs of goodly trees, branches of palm trees, and the boughs of thick trees, and willows of the brook; and ye shall rejoice before the LORD your God seven days.

Job 40:22
The shady trees cover him with their shadow; the willows of the brook compass him about.

Psalms 137:2
We hanged our harps upon the willows in the midst thereof.

Isaiah 15:7
Therefore the abundance they have gotten, and that which they have laid up, shall they carry away to the brook of the willows.

Isaiah 44:4
And they shall spring up as among the grass, as willows by the water courses.