Midrasch zu Könige II 20:13

And Hezekiah saw the messengers, and his heart was puffed with pride, and he showed them all the treasures of the kings of Judah, and all the treasures of the Holy of Holies in the Temple, and further, he opened the Ark of the Covenant, and he showed them the tables of the Law, and he said to them: With this do we wage war and conquer, as it is said, "And Hezekiah was glad of them, and shewed them the house of his precious things" (Isa. 39:2). The Holy One, blessed be He, was angry with him, and He said to him: Was it not enough for thee to have shown them all the treasures of the kings of Judah and all the treasures of the Holy of Holies? Moreover, thou hast opened for them the Ark, and hast shown them the tables, the work of My hand. By thy life! They shall come up and take away all the treasures of the kings of Judah, and all the treasures of the Holy of || Holies, as it is said, "Behold, the days come, that all that is in thine house, and that which thy fathers have laid up in store until this day, shall be carried to Babylon" (Isa. 39:6). Instead of the tables of the Law, they shall take of thy sons to be eunuchs in the palace of the king of Babylon, as it is said, "And of thy sons that shall issue from thee, which thou shalt beget, shall they take away; and they shall be eunuchs in the palace of the king of Babylon" (Isa. 39:7). These were Hananiah, Mishael, and Azariah, who were made eunuchs in the palace of the king of Babylon, and they did not beget children. Concerning them the Scripture says, "For thus saith the Lord to the eunuchs that keep my sabbaths,… Unto them will I give in mine house and within my walls a memorial and a name better than of sons and of daughters; I will give them an everlasting name, that shall not be cut off" (Isa. 56:4, 5).