one who is resting on the mattress, thiruvananthāzhwān (ādhiṣĕsha), to be worshipped by such rituals —

emperumān who reclines on ādhiṣĕshan —

having the divine serpent as mattress —

emperumān has the furious ananthāzhwān (ādhiṣĕsha) as his mattress. ṭhat emperumān’s —