Book of Jasher 17:4
And at that time the children of Tubal swore to the children of Chittim, saying, You shall not intermarry amongst us, and no man shall give his daughter to any of the sons of Chittim.
And at that time the children of Tubal swore to the children of Chittim, saying, You shall not intermarry amongst us, and no man shall give his daughter to any of the sons of Chittim.