1 Samuel 17:4

A champion - literally, “a man between the two camps:” i. e., one who did not fight in the ranks like an ordinary soldier, but came forth into the space between the hostile camps to challenge the mightiest man of his enemies to come and fight him.

Goliath of Gath - One of the places mentioned in Joshua 11:22 as still retaining a remnant of the sons of Anak; Gaza and Ashdod being the others. The race of giants (the Rephaim, from רפא râphâ' ) is mentioned again in the account of David’s Philistine wars 2 Samuel 21:15; 1 Chronicles 20:4. It appears from these passages that Goliath had a brother Lahmi. Four are named as being “born to the giant in Gath.” See Deuteronomy 2:10, Deuteronomy 2:20; Deuteronomy 3:11.

Six cubits ... - If the cubit, the length from the elbow to the tip of the middle finger, is about 1 12 feet; and the span, the distance from the thumb to the middle or little finger, when stretched apart to the full length, be half a cubit, six cubits and a span would equal about nine feet nine inches. The bed of Og king of Bashan was nine cubits long Deuteronomy 3:11.