הֱיֵ֤ה לִ֨י ׀ לְצ֥וּר מָע֡וֹן לָב֗וֹא תָּמִ֗יד צִוִּ֥יתָ לְהוֹשִׁיעֵ֑נִי כִּֽי־סַלְעִ֖י וּמְצוּדָתִ֣י אָֽתָּה׃
Be Thou to me a sheltering rock, whereunto I may continually resort, Which Thou hast appointed to save me; For Thou art my rock and my fortress.
Read Kabbalistic (mystical) interpretations of Psalms 71:3: Zohar and classical Jewish mystical sources, free online.