עֶ֤רֶב וָבֹ֣קֶר וְ֭צָהֳרַיִם אָשִׂ֣יחָה וְאֶהֱמֶ֑ה וַיִּשְׁמַ֥ע קוֹלִֽי׃
Evening, and morning, and at noon, will I complain, and moan; And He hath heard my voice.
Read kabbalistic (mystical) interpretation of Psalms 55:18: and classical mystical sources.