Commentary for II Chronicles 32:30

וְה֣וּא יְחִזְקִיָּ֗הוּ סָתַם֙ אֶת־מוֹצָ֞א מֵימֵ֤י גִיחוֹן֙ הָֽעֶלְי֔וֹן וַֽיַּישְּׁרֵ֥ם לְמַֽטָּה־מַּעְרָ֖בָה לְעִ֣יר דָּוִ֑יד וַיַּצְלַ֥ח יְחִזְקִיָּ֖הוּ בְּכָֽל־מַעֲשֵֽׂהוּ׃

This same Hezekiah also stopped the upper spring of the waters of Gihon, and brought them straight down on the west side of the city of David. And Hezekiah prospered in all his works.

Rashi on II Chronicles