In Psalm 99,4 the first stich is a circumstantial clause expressing causality relative to the clause following it. Verse 4 means to say that YHWH's royal power is exercised in establishing justice, as is shown by his acts in Israel. A syntax identical with that of the first line in Ps 99,4 can be found in Gen 50,20; Ezek 2,4a; Hab 1,10; Ps 40,18a.