Bag

Boyd’s Bible Dictionary:

(swelling). The bag of 2 Kings 5:23; 12:1023And Naaman said, Be content, take two talents. And he urged him, and bound two talents of silver in two bags, with two changes of garments, and laid them upon two of his servants; and they bare them before him. (2 Kings 5:23)
10And it was so, when they saw that there was much money in the chest, that the king's scribe and the high priest came up, and they put up in bags, and told the money that was found in the house of the Lord. (2 Kings 12:10), was for holding money; that of Deuteronomy 25:13-1513Thou shalt not have in thy bag divers weights, a great and a small. 14Thou shalt not have in thine house divers measures, a great and a small. 15But thou shalt have a perfect and just weight, a perfect and just measure shalt thou have: that thy days may be lengthened in the land which the Lord thy God giveth thee. (Deuteronomy 25:13‑15) for carrying weights. Sack was the Hebrew grain-bag (Gen. 42:2525Then Joseph commanded to fill their sacks with corn, and to restore every man's money into his sack, and to give them provision for the way: and thus did he unto them. (Genesis 42:25)). The shepherd’s bag was for carrying feeble lambs (Zech. 11:15-1715And the Lord said unto me, Take unto thee yet the instruments of a foolish shepherd. 16For, lo, I will raise up a shepherd in the land, which shall not visit those that be cut off, neither shall seek the young one, nor heal that that is broken, nor feed that that standeth still: but he shall eat the flesh of the fat, and tear their claws in pieces. 17Woe to the idol shepherd that leaveth the flock! the sword shall be upon his arm, and upon his right eye: his arm shall be clean dried up, and his right eye shall be utterly darkened. (Zechariah 11:15‑17)). The bag of Judas was probably a small chest (John 12:6; 13:296This he said, not that he cared for the poor; but because he was a thief, and had the bag, and bare what was put therein. (John 12:6)
29For some of them thought, because Judas had the bag, that Jesus had said unto him, Buy those things that we have need of against the feast; or, that he should give something to the poor. (John 13:29)).

From Manners and Customs of the Bible:

Money was kept in the royal treasuries in bags, the value of the contents being first ascertained and marked upon each bag, which was then sealed.
Thenceforth, as long as the seal remained unbroken, the bag was estimated at its marked value, without re-counting. This was customary in ancient Egypt, and is still the usage in Persia and in other parts of the East. It is not confined to royal treasuries; but private bankers pursue a similar plan, so that in some parts of the Levant a “purse” is the word used for a particular sum of money. These bags are made of cotton-cloth, and are of different sizes, as they are used for carrying gold, silver, or copper pieces. A similar custom seems to be referred to in 2 Kings 12:1010And it was so, when they saw that there was much money in the chest, that the king's scribe and the high priest came up, and they put up in bags, and told the money that was found in the house of the Lord. (2 Kings 12:10).

Related Books and Articles:

774. Money Bags