Talmud su Salmi 51:17

Rebbi Yose from Sidon¹⁸⁷A student of Rebbi Jeremiah, from the city of Sidon. The statements of R. Yoḥanan are in Babli 9b. There the requirement of recitation of these verses is noted as “institutions of the Rabbis”; the Babli would not tolerate the action of Rebbi Yudan. in the name of Rebbi Yoḥanan: Before one’s prayer one says (Ps. 51:17) “Master, open my lips that my mouth may proclaim Your praise.” After one’s prayer, one says (Ps. 19:15): “May the sayings of my mouth be agreeable and the thoughts of my heart, before You, my Rock and my Redeemer.” Rebbi Yudan used to say both of them before his prayer.