וַיֹּאמַ֗ר אָנָּ֤ה יְהוָה֙ זְכָר־נָ֞א אֵ֣ת אֲשֶׁ֧ר הִתְהַלַּ֣כְתִּי לְפָנֶ֗יךָ בֶּֽאֱמֶת֙ וּבְלֵ֣ב שָׁלֵ֔ם וְהַטּ֥וֹב בְּעֵינֶ֖יךָ עָשִׂ֑יתִי וַיֵּ֥בְךְּ חִזְקִיָּ֖הוּ בְּכִ֥י גָדֽוֹל׃ (ס)
說：«永恆者啊，我懇求你，求你記念我在你面前怎樣以誠實和完全的心行事，又做你眼中看為善的事。»希西家就放聲大哭。
Rashi
AND HE HID THE BOOK OF REMEDIES. As it is written (II Kings 20:3; Isa. 38:3), "I have done what is pleasing (and righteous) to You." And we said in B'rachot that he hid the Book of Remedies because their minds were not subdued by the illness; instead, they would be healed instantly.