The temple treasury was a storehouse (Hebrew אוצר 'otsar) first of the tabernacle then of the Jerusalem Temples mentioned in the Hebrew Bible. The term "storehouse" is generic, and also occurs later in accounts of life in Roman Palestine where the otzar was a tax-collector's grainhouse.
The first mention of the "treasury of the LORD" occurs in Joshua 6:19 where all the silver and gold vessels are consecrated to a "storehouse" which travelled with the tabernacle. Later, this was made permanent in the First Temple, till the treasury was pillaged by Nebuchadnezzar's army.
In the Second Temple, the treasury was used for storing the grain for the Levites. In Nehemiah and Zechariah, this became the subject of contention when Eliashib, grandson of Joshua the high priest, leased the storehouse to Sanballat the Horonite.
A related term, the korbanas, is found in the New Testament (Matthew 27:6) where the money of Judas Iscariot cannot be received into the temple "treasury," or korbanas, because it is "blood money." Josephus explains this term korbanas as the temple treasury - ton hieron thesauron, kaleitai de korbanas (War of the Jews 2.9.4; #175) 
- Zeev Safrai The economy of Roman Palestine - Page 67 1994 "Thus, for instance, the wheat bought at Javneh, mentioned above, was purchased at a storehouse (“otzar”), which was an official government storehouse used to store taxes .."
- Roland De Vaux Ancient Israel: its life and institutions 1997 Page 322 "This, too, was how Solomon's Temple came to an end. After the first invasion of Nabuchodonosor, in 597, the Temple treasury was pillaged along with the royal exchequer (2 K 24: 13)."
- Raymond E. Brown The death of the Messiah: from Gethsemane to the grave Page 645 - 1994 "The two ideas are joined in a Josephus reference (War 2.9.4; #175) that calls the contents of the sacred treasury (hieros thesauros) korbanas.20 Presumably the money to pay Judas came from the Temple treasury, and that is why Judas threw .."