Reference: Armoury

the place in which armour was deposited when not used (Ne 3:19; Jer 50:25). At first each man of the Hebrews had his own arms, because all went to war. There were no arsenals or magazines for arms till the time of David, who had a large collection of arms, which he consecrated to the Lord in his tabernacle (1Sa 21:9; 2Sa 8:7-12; 1Ch 26:26-27).

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In Ne 3:19 the word is nesheq also translated 'armour.' In Cant. 4:4 it is talpiyyoth, 'armoury' or heap of swords. In Jer 50:25 it is otsar, signifying 'treasury.'