Manava Dharmashastra 6.23

6.23

pañcabhirātmānaṃ tāpayet | catasṛṣu dikṣu agnīnsannidhāpya madhye tiṣṭhedupariṣṭādādityatāpaṃ seveta | prāvṛṣyabhrāṇyevāvakāśa āśrayaḥ, yasmindeśe devo varṣati taṃ pradeśamāśrayedvarṣanivāraṇārthaṃ chatravastrādi na gṛhṇīyāt | hemante | śītopalakṣaṇārtham | etena śiśire'pyeṣa eva vidhiḥ ārdravāsastvam | kramaśaḥ krameṇa |

‘At the savanas.’—i.e., in the morning, at midday and in the evening; —‘going to water’.—This indicates that where a river or some such reservoir of water is not available, one may perform his bath even with water pulled out (of a well).—(22).