אֲנִ֤י יְהוָה֙ נֹֽצְרָ֔הּ לִרְגָעִ֖ים אַשְׁקֶ֑נָּה פֶּ֚ן יִפְקֹ֣ד עָלֶ֔יהָ לַ֥יְלָה וָי֖וֹם אֶצֳּרֶֽנָּה׃
Ich, der Herr, sein Hüter tränke ihn jeglichen Augenblick; dass sich keiner an ihm vergreife, bewache ich ihn Tag und Nacht.
Ibn Ezra on Isaiah
I, the Lord, do keep it, that is to say, the Divine glory remains in Zion.
Rashi on Isaiah
every moment I water it Little by little I water it with the cup of retribution that comes upon it, lest I visit upon it at once and I destroy it. Therefore, night and day I ponder about it. Jonathan renders: Were it not that I visit upon them the iniquities that they are accustomed to commit before Me, I would guard it day and night.