New Revised Standard Version
The shaft of his spear was like a weaver’s beam, and his spear’s head weighed six hundred shekels of iron; and his shield-bearer went before him.

Contemporary English Version
and his spear was so big that the iron spearhead alone weighed about seven kilograms. A soldier always walked in front of Goliath to carry his shield.

New American Bible
The shaft of his javelin was like a weaver’s beam, and its iron head weighed six hundred shekels. His shield-bearer went ahead of him.

Douay-Rheims Bible
And the staff of his spear was like a weaver's beam, and the head of his spear weighed six hundred sicles of iron: and his armourbearer went before him.

And the staff of his spear was like a weaver's beam, and the head of his spear weighed six hundred sicles of iron: and his armourbearer went before him.

the staff

2 Samuel 21:19 And there was a third battle in Gob against the Philistines, in which Adeodatus the son of the Forrest an embroiderer of Bethlehem slew Goliath the Gethite, the shaft of whose spear was like a weaver's beam.

1 Chronicles 11:23 And he slew an Egyptian, whose stature was of five cubits, and who had a spear like a weaver's beam: and he went down to him with a staff, and plucked away the spear, that he held in his hand, and slew him with his own spear.

1 Chronicles 20:5 Another battle also was fought against the Philistines, in which Adeodatus the son of Saltus a Bethlehemite slew the brother of Goliath the Gethite, the staff of whose spear was like a weaver's beam.