Kautilya's Arthashastra 2.30.19

2.30.19

dīrghapathabhāraklāntānāṃ ca khādanārthaṃ snehaprastho 'nuvāsanaṃ kuḍubo nasyakarmaṇaḥ, yavasasyārdhabhāras tṛṇasya dviguṇaḥ ṣaḍaratniparikṣepaḥ puñjīlagraho vā //

The same quantity of drink shall be specially given to those horses which are tired of long journey or of carrying loads.

One prastha of oil for giving enema (anuvásana), 1 kudumba of oil for rubbing over the nose, 1,000 palas of meadow grass, twice as much of ordinary grass (trina); and hay-stalk or grass shall be spread over an area of 6 aratnis.