and Ishbi-benob, who was one of the descendants of Rapha, whose spear weighed 300 shekels of bronze,a he being armed with a new sword, intended to kill David. Bible see other translations
Roughly 7.5 pounds (3.4 kg)

“Rapha.” Rapha was one of the Nephilim, the “Fallen Ones.” Rapha is mentioned four times in this chapter: 2 Sam. 21:16, 18, 20, and 21:22 and in other places in the Old Testament as well.

[For more on the Nephilim and the connection between them and Rapha, see commentary on Gen. 6:4.]

“spear.” The Hebrew word for “spear” is uncertain, but “spear” is a likely candidate for the word.

“300 shekels.” 300 shekels is roughly 7.5 pounds (3.4 kg). A shekel was roughly .4 ounces (11 or 11.5 grams), (see commentary on Gen. 24:22, “shekel”). A spear point that heavy would make the spear very slow when used in battle unless the person was incredibly big and strong, which Ishbi-benob was.

“being armed with a new sword,” The Hebrew does not have an object, and the scholars are divided. Some say “sword,” others “armor,” and others mention other possibilities.

Commentary for: 2 Samuel 21:16