יְהוָ֤ה ׀ סַֽלְעִ֥י וּמְצוּדָתִ֗י וּמְפַ֫לְטִ֥י אֵלִ֣י צ֭וּרִי אֶֽחֱסֶה־בּ֑וֹ מָֽגִנִּ֥י וְקֶֽרֶן־יִ֝שְׁעִ֗י מִשְׂגַּבִּֽי׃
Herr, mein Fels und meine Burg und mein Erretter bist du! Mein Gott, mein Hort, bei dem ich mich berge, mein Schild, Horn meines Heils, meine Feste.
Rashi on Psalms
my rock For You saved me at the Rock of the Divisions (I Sam. 23:28), when I was trapped between Saul and his men, to be caught, as it is stated (in I Sam. 23:26): “but Saul and his men were encircling to David and his men etc.”
Rashi on Psalms
and my fortress Heb. ומצודתי, an expression of a fortress.