שָׁ֣לַֽח חֹ֭שֶׁךְ וַיַּחְשִׁ֑ךְ וְלֹֽא־מָ֝ר֗וּ אֶת־דברוו [דְּבָרֽוֹ׃]
Er sandte Finsternis und machte finster, sie widerstrebten nicht seinem Worte.
Rashi on Psalms
And they did not disobey His word The plagues, that He commanded upon them, came according to His commandments and did not deviate from His word.