so 'svam rupam ca tad dhitva
sah-King Indra; asvam-the horse; rupam-the false dress of a saintly person; ca-also; tat-that; hitva-giving up; tasmai-for him; antarhitah-disappeared; sva-rat-Indra; virah-the great hero; sva-pasum-his animal; adaya-having taken; pituh-of his father; yajnam-to the sacrifice; upeyivan-he came back.