CC Madhya 19.96

śrutim apare smṛtim itare bhāratam anye bhajantu bhava-bhītāḥ
aham iha nandaṁ vande yasyālinde paraṁ brahma

Synonyms
śrutim — Vedic literature; apare — someone; smṛtim — corollary to the Vedic literature; itare — others; bhāratam — the Mahābhārata; anye — still others; bhajantu — let them worship; bhava-bhītāḥ — those who are afraid of material existence; aham — I; iha — here; nandam — Mahārāja Nanda; vande — worship; yasya — whose; alinde — in the courtyard; param brahma — the Supreme Brahman, Absolute Truth.

Translation
Raghupati Upādhyāya recited, “Those who are afraid of material existence worship the Vedic literature. Some worship smṛti, the corollaries to the Vedic literature, and others worship the Mahābhārata. As far as I am concerned, I worship Kṛṣṇa’s father, Mahārāja Nanda, in whose courtyard the Supreme Personality of Godhead, the Absolute Truth, is playing.”

Purport
This verse recited by Raghupati Upādhyāya was later included in Śrī Rūpa Gosvāmī’s Padyāvalī (126).

The Supreme Personality of Godhead, Kṛṣṇa, is the fountainhead of all incarnations. Lord Balarāma is His second body.

These two are one and the same identity. They differ only in form. Lord Balarāma is the first bodily expansion of Kṛṣṇa, and He assists in Lord Kṛṣṇa’s transcendental pastimes.

That original Lord Kṛṣṇa appeared in Navadvīpa as Lord Caitanya, and Balarāma appeared with Him as Lord Nityānanda.

May Śrī Nityānanda Rāma be the object of my constant remembrance. Sańkarṣaṇa, Śeṣa Nāga and the Viṣṇus who lie on the Kāraṇa Ocean, Garbha Ocean and ocean of milk are His plenary portions and the portions of His plenary portions.

Lord Balarāma is the original Sańkarṣaṇa. He assumes five other forms to serve LordKṛṣṇa.

He Himself helps in the pastimes of Lord Kṛṣṇa, and He does the work of creation in four other forms.

He executes the orders of Lord Kṛṣṇa in the work of creation, and in the form of Lord Śeṣa He serves Kṛṣṇa in various ways.

In all the forms He tastes the transcendental bliss of serving Kṛṣṇa. That same Balarāma is Lord Nityānanda, the companion of Lord Gaurasundara.
( cc.adi.5. 4-11)