כִּ֛י י֥וֹם נָקָ֖ם בְּלִבִּ֑י וּשְׁנַ֥ת גְּאוּלַ֖י בָּֽאָה׃
For the day of vengeance that was in My heart, and My year of redemption are come.
Ibn Ezra on Isaiah
For the day of vengeance, etc. For I will wreak vengeance against my enemies, and I will redeem my friends. גאולי My redeemed. It is participle passive plural with the suffix, first person, referring to God.