צִ֭וִּיתָ צֶ֣דֶק עֵדֹתֶ֑יךָ וֶֽאֱמוּנָ֥ה מְאֹֽד׃
Thou hast commanded Thy testimonies in righteousness and exceeding faithfulness.
Read halakhic rulings (Jewish law) on Psalms 119:138 from the Mishneh Torah and classical halakhic sources, free online.