Gobhilagrihyasutra 2.9.4

2.9.4

ekavim̐śatir darbhapiñjūlya uṣṇodakakam̐sa audumbaraḥ kṣura ādarśo vā kṣurapāṇir nāpita iti dakṣiṇataḥ,

To the south (of the fire) twenty-one Darbha blades, a brass vessel with hot water, a razor of Udumbara wood or a mirror, and a barber with a razor in his hand;