SB 10.15.32

sa taṁ gṛhītvā prapador
 bhrāmayitvaika-pāṇinā
cikṣepa tṛṇa-rājāgre
 bhrāmaṇa-tyakta-jīvitam
Word for word: 
saḥ — He; tam — him; gṛhītvā — seizing; prapadoḥ — by the hooves; bhrāmayitvā — whirling around; eka-pāṇinā — with a single hand; cikṣepa — He threw; tṛṇa-rāja-agre — into the top of a palm tree; bhrāmaṇa — by the whirling; tyakta — giving up; jīvitam — his life.
Translation: 
Lord Balarāma seized Dhenuka by his hooves, whirled him about with one hand and threw him into the top of a palm tree. The violent wheeling motion killed the demon.