Genesis 6:4
The Nephilim were on the earth in those days, and also afterward, when the sons of God came in to the daughters of man and they bore children to them. These were the mighty men who were of old, the men of renown.
Numbers 13:33
And there we saw the Nephilim (the sons of Anak, who come from the Nephilim), and we seemed to ourselves like grasshoppers, and so we seemed to them."
Deuteronomy 3:11
(For only Og the king of Bashan was left of the remnant of the Rephaim. Behold, his bed was a bed of iron. Is it not in Rabbah of the Ammonites? Nine cubits was its length, and four cubits its breadth, according to the common cubit.)
Genesis 11:4
Then they said, "Come, let us build ourselves a city and a tower with its top in the heavens, and let us make a name for ourselves, lest we be dispersed over the face of the whole earth."
Numbers 16:2
And they rose up before Moses, with a number of the people of Israel, 250 chiefs of the congregation, chosen from the assembly, well-known men.
Deuteronomy 2:20-21
(It is also counted as a land of Rephaim. Rephaim formerly lived there--but the Ammonites call them Zamzummim--
1 Samuel 17:4
And there came out from the camp of the Philistines a champion named Goliath of Gath, whose height was six cubits and a span.
2 Samuel 21:15-22
There was war again between the Philistines and Israel, and David went down together with his servants, and they fought against the Philistines. And David grew weary.