תהילים סח:ו פירוש: רש״י

O Father of orphans And this is the praise that You shall praise before Him: the entire matter until the end of the psalm.

Father of orphans Who became a father to Israel, who are orphans, as it is said (Lam. 5:3): “We were orphans without a father.”

and Judge of widows Who performed the judgment of Jerusalem, concerning which it says (Lam. 1:1): “was like a widow.”