(א) לְאָדָ֥ם מַֽעַרְכֵי־לֵ֑ב וּ֝מֵיְהוָ֗ה מַעֲנֵ֥ה לָשֽׁוֹן׃
(1) A man may arrange his thoughts, But what he says depends on the LORD.
() אדושם שפָתַי תִּפְתָּח וּפִי יַגִּיד תְּהִלָּתֶךָ:
O Lord, open my lips and my mouth will declare Your praise.
(יז) אדושם שְׂפָתַ֣י תִּפְתָּ֑ח וּ֝פִ֗י יַגִּ֥יד תְּהִלָּתֶֽךָ׃ (יח) כִּ֤י ׀ לֹא־תַחְפֹּ֣ץ זֶ֣בַח וְאֶתֵּ֑נָה ע֝וֹלָ֗ה לֹ֣א תִרְצֶֽה׃ (יט) זִֽבְחֵ֣י אֱלֹקִים֮ ר֪וּחַ נִשְׁבָּ֫רָ֥ה לֵב־נִשְׁבָּ֥ר וְנִדְכֶּ֑ה אֱ֝לֹקִ֗ים לֹ֣א תִבְזֶֽה׃
(17) O Lord, open my lips, and let my mouth declare Your praise. (18) You do not want me to bring sacrifices; You do not desire burnt offerings; (19) True sacrifice to God is a contrite spirit; God, You will not despise a contrite and crushed heart.
(יד) ואז"ל (סוטה ה ב): כמה גדולים נמוכי הרוח, שבזמן שבית המקדש קיים אדם מקריב עולה שכר עולה בידו, מנחה שכר מנחה בידו, אבל מי שדעתו שפלה עליו מעלה עליו הכתוב כאילו הקריב כל הקרבנות כולם, שנאמר (תהלים נא:יט): "זבחי אלקים רוח נשברה",
(14) Our sages, of blessed memory, said (Sotah 5b): "Rabbi Yehoshua ben Levi said: Come and see how great are the lowly of spirit, for when the Temple stood, a man brought a burnt-offering and earned the reward of a burnt-offering, a flour-offering and he earned the reward of a flour-offering; but as for him whose mind is lowly, Scripture ascribes it to him as though he had offered every one of the sacrifices; as it is said: The sacrifices of G-d are a broken spirit."
Mesillat Yesharim or Mesillas Yeshorim (Hebrew: מסילת ישרים, lit. "Path of the Upright") is an ethical (musar) text composed by the influential Rabbi Moshe Chaim Luzzatto (1707–1746)
(15) May the words of my mouth and the prayer of my heart be acceptable to You, O LORD, my rock and my redeemer.
Thanks go to Yossi Pollack who taught a session at Limmud NY on the source of Ad0nai sefatai tiftach in the name of his teacher, Rabbi Goldmintz.