Caitanya-caritāmṛta 15.75
sulalita dīrghārgala, kṛṣṇera bhuja-yugala, bhuja nahe, — kṛṣṇa-sarpa-kāya dui śaila-chidre paiśe, nārīra hṛdaye daṁśe, mare nārī se viṣa-jvālāya
[sulalita deerghaargala, krishnera bhuja-yugala, bhuja nahe, — krishna-sarpa-kaaya dui shaila-chidre paishe, naareera hridaye damshe, mare naaree se visha-jvaalaaya]
Blended reading (Sanskrit + English inline)
sulalita dīrghārgala, kṛṣṇera bhuja-yugala, bhuja nahe, — kṛṣṇa-sarpa-kāya dui śaila-chidre paiśe, nārīra hṛdaye daṁśe, mare nārī se viṣa-jvālāya
“The two very beautiful arms of Kṛṣṇa are just like long bolts. They also resemble the bodies of black snakes that enter the space between the two hill-like breasts of women and bite their hearts. The women then die from the burning poison.
Purport
In other words, the gopīs become very much agitated by lusty desire; they are burning due to the poisonous bite inflicted by the black snakes of Kṛṣṇa’s beautiful arms.
— A.C. Bhaktivedanta Swami Prabhupāda
My note
Source: vedabase.io