CREATE TABLE table_72203 ("Acquisition" TEXT, "knowledge" TEXT, "penance" TEXT, "permanence of the body" TEXT, "constancy" TEXT, "purity" TEXT)

what's the permanence of the body where purity is rudra
SELECT "permanence of the body" FROM table_72203 WHERE "purity" = 'Rudra'
SELECT "permanence of the body" FROM "table_72203" WHERE "purity" = 'Rudra'