וַיַּסֵּ֧ב חִזְקִיָּ֛הוּ פָּנָ֖יו אֶל־הַקִּ֑יר וַיִּתְפַּלֵּ֖ל אֶל־יְהוָֽה׃
האָט חִזקִיָהו אומגעדרײט זײַן פּנים צו דער װאַנט, און האָט מתפּלל געװען צו גאָט,
Sichot HaRan
Afterwards, I heard in his name that this is the aspect of the verse "And Chizkiyahu turned his face to the wall" (Isaiah 38:2). That he turned and drew down is face, which is his mind and knowledge, to the walls of his heart, as explained above.