Verses with the word customs in the Old Testament (2 verses):

Leviticus 18:30
Therefore shall ye keep mine ordinance, that ye commit not any one of these abominable customs, which were committed before you, and that ye defile not yourselves therein: I am the LORD your God.

Jeremiah 10:3
For the customs of the people are vain: for one cutteth a tree out of the forest, the work of the hands of the workman, with the axe.