Angirasasmriti 2.11.3

2.11.3

pādaśaucakriyā kāryā adbhiḥ kurvīta kevalam /
vrativaddhārayedaṇḍaṃ samantrāṃ mekhalāṃ tathā //

The act of washing his feet must be done; he should do it with water alone; / like an observer of vows, he should hold a staff and wear a girdle with mantras.