namuciḥ - the demon named Namuci; pañca-daśabhiḥ - with fifteen; svarṇa-puṅkhaiḥ - with golden feathers attached; mahā-iṣubhiḥ - very powerful arrows; āhatya - piercing; vyanadat - resounded; saṅkhye - on the battlefield; sa-toyaḥ - bearing water; iva - like; toya-daḥ - a cloud that delivers rain.

Then Namuci, another demon, attacked Indra and injured him with fifteen very powerful golden-feathered arrows, which roared like a cloud full of water.