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

paragraph 32

‘The cooking-hearth, I said. A foal was cooked for us on it. A foal is the ruin of a chariot to the end of three weeks22
[...]
and there is a gess on a chariot to the end of three weeks for any man to enter it after having last eaten horse-flesh. For it is the horse that sustains the chariot.’