Psalmów 118:19 Kabała: Sha'arei Orah

We now must inform you of the secret of two verses that our sages, of blessed memory, incorporated into the Amidah prayer. The first verse,¹³⁹Psalms 51:17 “Lord-Adona”y-אדנ"י open my lips,” begins the prayer and the second verse,¹⁴⁰Psalms 19:15 “May the words of my mouth be desirable-L’Ratzon-לרצון,” ends the prayer. Know that the first verse, “Lord-Adona”y-אדנ"י open my lips,” at the beginning of the Amidah prayer, is the gateway by which the people of the world enter to plead for mercy before HaShem-יהו״ה, blessed is He. About this the verse states,¹⁴¹Psalms 118:19 “Open the gates of righteousness-Tzedek-צדק for me, I will enter them and thank Ya”h-י״ה.” The conclusion of proper and fitting prayer, which becomes progressively strengthened by ascending from Sefirah to Sefirah until one reaches the Desire-Ratzon-רצון that adheres to the Crown-Keter, concludes with the verse, “May the words of my mouth be desirable-L’Ratzon-לרצון.”