Genesis 4:2

² Then again she became with child and gave birth to Abel, his brother. And Abel was a keeper of sheep, but Cain was a farmer.

Tarshish, Pul, Lud, Tubal, and Javan

'Tarshish, Pul, Lud, Tubal, and Javan,' as listed in Isaiah 66:19, signify varieties of external worship.