SB 10.67.24

sa bāhū tāla-saṅkāśau
 muṣṭī-kṛtya kapīśvaraḥ
āsādya rohiṇī-putraṁ
 tābhyāṁ vakṣasy arūrujat
Word for word: 
saḥ — he; bāhū — both his arms; tāla — palm trees; saṅkāśau — as big as; muṣṭī — into fists; kṛtya — making; kapi — of apes; īśvaraḥ — the most powerful; āsādya — confronting; rohiṇī-putram — the son of Rohiṇī, Balarāma; tābhyām — with them; vakṣasi — upon His chest; arūrujat — he beat.
Translation: 
Dvivida, the most powerful of apes, now clenched his fists at the end of his palm-tree-sized arms, came before Lord Balarāma and beat his fists against the Lord’s body.