וְיֶ֨תֶר דִּבְרֵ֤י חִזְקִיָּ֙הוּ֙ וְכָל־גְּב֣וּרָת֔וֹ וַאֲשֶׁ֣ר עָשָׂ֗ה אֶת־הַבְּרֵכָה֙ וְאֶת־הַתְּעָלָ֔ה וַיָּבֵ֥א אֶת־הַמַּ֖יִם הָעִ֑ירָה הֲלֹא־הֵ֣ם כְּתוּבִ֗ים עַל־סֵ֛פֶר דִּבְרֵ֥י הַיָּמִ֖ים לְמַלְכֵ֥י יְהוּדָֽה׃
Rashi on II Kings
And how he made the pool, etc. In Divrei Hayomim.24See II Divrei Hayomim 32:3-4 and 30. When Sancheiriv began his march on Yerusholayim, Chizkiyohu closed off all the springs and streams outside Yerusholayim as a defensive strategy.