CC Antya 18.71

bhūmite paḍi’ āche prabhu dīrgha saba kāya
jale śveta-tanu, vālu lāgiyāche gāya
Word for word: 
bhūmite — on the ground; paḍi’ — lying; āche — was; prabhu — Śrī Caitanya Mahāprabhu; dīrgha — elongated; saba kāya — the whole body; jale — by the water; śveta-tanu — white body; vālu — sand; lāgiyāche gāya — was smeared over the body.
Translation: 
The Lord was lying on the ground, His body elongated and bleached white by the water. He was covered from head to foot with sand.