eta mūrti-bheda kari’ kṛṣṇa-sevā kare
kṛṣṇera śeṣatā pāñā ‘śeṣa’ nāma dhare
Translation:
He is thus called Lord Śeṣa, for He has attained the ultimate end of servitude to Kṛṣṇa. He takes many forms for the service of Kṛṣṇa, and thus He serves the Lord.