בְּקָרְאִ֡י עֲנֵ֤נִי ׀ אֱלֹ֘הֵ֤י צִדְקִ֗י בַּ֭צָּר הִרְחַ֣בְתָּ לִּ֑י חָ֝נֵּ֗נִי וּשְׁמַ֥ע תְּפִלָּתִֽי׃
אַז איך רוף, ענטפֿער מיר, גאָט מײַן גערעכטער;אין ענגעניש זאָלסטו מיר דערברײטערן;לײַטזעליק מיך, און הער צו מײַן תּפֿילה.
Rashi
in my distress You have relieved me in the days that have passed over me. From now on, be gracious to me and hearken to my prayer.
Radak
Answer me when I call, O God (Judge) of my righteousness: – It is certain that this Psalm likewise was uttered (by David) in his flight before Absalom; and he says, Answer me when I call, O God (Judge) of my righteousness, for Thou knowest that with me is the right, and with him who is against me the wrong and the violence; and Thou, Lord, art Judge over us. For in every instance where אלהים (‘Elohim) occurs it has the meaning “judge,” as we have interpreted the verse “Verily there is a God (Judge) that judges in the earth” (Ps. 58:12). And men who are judges are so called: “The cause of both parties shall come before the ’Elohim (judges)” (Exod. 22:8); “Then his master shall bring him unto ’Elohim (the judges)” (ibid. 21:6).
Ibn Ezra
When I call (בְּקָרְאִי - be-kor'i): And the meaning of O God, my vindicator (אֱלֹהֵי צִדְקִי - Elokei tzidki, lit. "God of my righteousness") is: You are the primary cause (ha-sibbah ha-rishonah) for showing/revealing my righteousness (le-har'ot tzidki).