כֵּ֣ן יִֽהְיֶ֤ה דְבָרִי֙ אֲשֶׁ֣ר יֵצֵ֣א מִפִּ֔י לֹֽא־יָשׁ֥וּב אֵלַ֖י רֵיקָ֑ם כִּ֤י אִם־עָשָׂה֙ אֶת־אֲשֶׁ֣ר חָפַ֔צְתִּי וְהִצְלִ֖יחַ אֲשֶׁ֥ר שְׁלַחְתִּֽיו׃
demikianlah firman-Ku yang keluar dari mulut-Ku: firman itu tidak akan kembali kepada-Ku dengan sia-sia, tetapi akan melakukan apa yang Aku kehendaki dan berhasil dalam tugas yang untuknya Aku mengutusnya.
Tze'enah Ure'enah
“So is the word that issues from My mouth, etc.” [55:11]. My words that I have said through the prophets will not be for nothing, or it will be that he does what I desire from him. He will bewail where I have sent him.
Rashi
so shall be My word that emanates from My mouth to inform you through the prophets, will not return empty, but will do good to you if you heed them.
Ibn Ezra
So shall my word, etc. I shall fulfil all I spake to the prophets.