SB 10.15.2

tan mādhavo veṇum udīrayan vṛto
 gopair gṛṇadbhiḥ sva-yaśo balānvitaḥ
paśūn puraskṛtya paśavyam āviśad
 vihartu-kāmaḥ kusumākaraṁ vanam
Word for word: 
tat — thus; mādhavaḥ — Lord Śrī Mādhava; veṇum — His flute; udīrayan — sounding; vṛtaḥ — surrounded; gopaiḥ — by the cowherd boys; gṛṇadbhiḥ — who were chanting; sva-yaśaḥ — His glories; bala-anvitaḥ — accompanied by Lord Balarāma; paśūn — the animals; puraskṛtya — keeping in front; paśavyam — full of nourishment for the cows; āviśat — He entered; vihartu-kāmaḥ — desiring to enjoy pastimes; kusuma-ākaram — rich with flowers; vanam — the forest.
Translation: 
Thus desiring to enjoy pastimes, Lord Mādhava, sounding His flute, surrounded by cowherd boys who were chanting His glories, and accompanied by Lord Baladeva, kept the cows before Him and entered the Vṛndāvana forest, which was full of flowers and rich with nourishment for the animals.
Purport: 

Śrīla Sanātana Gosvāmī has explained the various meanings of the word mādhava as follows: Mādhava normally indicates Kṛṣṇa to be “the Lord, who is the consort of the goddess of fortune, Lakṣmī.” This name also implies that Lord Kṛṣṇa descended in the dynasty of Madhu. Since the spring season is also known as Mādhava, it is understood that as soon as Lord Kṛṣṇa entered the Vṛndāvana forest, it automatically exhibited all the opulences of spring, becoming filled with flowers, breezes and a celestial atmosphere. Another reason Lord Kṛṣṇa is known as Mādhava is that He enjoys His pastimes in madhu, the taste of conjugal love.

Lord Kṛṣṇa would loudly sound His flute as He entered the forest of Śrī Vṛndāvana, thus giving inconceivable bliss to all the residents of His hometown, Vraja-dhāma. These simple pastimes of playfully entering the forest, playing on the flute and so forth were performed daily in the spiritual land of Vṛndāvana.