אַל־תַּסְתֵּ֬ר פָּנֶ֨יךָ ׀ מִמֶּנִּי֮ אַֽל־תַּט־בְּאַ֗ף עַ֫בְדֶּ֥ךָ עֶזְרָתִ֥י הָיִ֑יתָ אַֽל־תִּטְּשֵׁ֥נִי וְאַל־תַּֽ֝עַזְבֵ֗נִי אֱלֹהֵ֥י יִשְׁעִֽי׃
Hide not Thy face far from me; Put not Thy servant away in anger; Thou hast been my help; Cast me not off, neither forsake me, O God of my salvation.
Read halakhic rulings (Jewish law) on Psalms 27:9: and classical halakhic sources.