John Gills Exposition of the Bible Commentary - Genesis 6:4
There were giants in the earth in those days ,.... That is, in the days before the sons of God took the daughters of men for wives, in such a general manner as before declared, or before the declension and apostasy became so universal; even in the times of Jared, as the Arabic writers F14 Elmacinus & Patricides apud Hottinger, p. 235, 236. understand it, who say that these giants were begotten on the daughters of Cain by the children of Seth, who went down from the mountain to them... read more
Matthew Henry's Complete Commentary - Genesis 6:4-5
We have here a further account of the corruption of the old world. When the sons of God had matched with the daughters of men, though it was very displeasing to God, yet he did not immediately cut them off, but waited to see what would be the issue of these marriages, and which side the children would take after; and it proved (as usually it does), that they took after the worst side. Here is, I. The temptation they were under to oppress and do violence. They were giants, and they were men of... read more