One verse

Srimad Bhagavatam 10.18.13

10.18.13

क्‍वचिन्नृत्यत्सु चान्येषु गायकौ वादकौ स्वयम् । शशंसतुर्महाराज साधु साध्विति वादिनौ ॥ १३ ॥

kvacin nṛtyatsu cānyeṣu gāyakau vādakau svayam śaśaṁsatur mahā-rāja sādhu sādhv iti vādinau

kvacit
sometimes
nṛtyatsu
while they were dancing
ca
and
anyeṣu
others
gāyakau
the two of Them (Kṛṣṇa and Balarāma) singing
vādakau
both playing musical instruments
svayam
Themselves
śaśaṁsatuḥ
They praised
mahā-rāja
O great King
sādhu sādhu iti
“very good, very good”
vādinau
speaking

While the other boys were dancing, O King, Kṛṣṇa and Balarāma would sometimes accompany them with song and instrumental music, and sometimes the two Lords would praise the boys, saying, “Very good! Very good!”