Corpus of Electronic Texts Edition
The Wooing of Emer by Cú Chulainn (Author: [unknown])

paragraph 85

Cuchulaind then wanted to go to the rath of Forgall. And the scythe-chariot was prepared for Cuchulaind that day. It was called scythe-chariot (carpat serrda) from the iron scythes that were from it, or again because it was first invented by the Serians.