The group of ascetics, who, during their practice of Parihāraviśuddhi Cāritra (purifactory conduct), perfrom the duty of rendering their services to those who are undertaking penance during their practice of purifacory conduct. They follow the practitioners in the same way as the cowkeeper follows the cows.
catvārau vaiyāvṛttyakarā...
(PrasāVṛ Pa 607)
aṇuparihārie govālae va ṇicca ujjuttamāutte...
(BṛBhā 6470)