Shiva Purana
मलस्नानं सुगंधाद्यैः स्नानं दन्तविशोधनम् ॥ न कुर्याद्ब्रह्मचारी च तपस्वी विधवा तथा ॥ ८ ॥
Neither a Brahmacārin nor an ascetic nor a widow shall take bath with the scented soaps. They shall not use tooth-brush twig for cleaning the teeth.
english translation
malasnAnaM sugaMdhAdyaiH snAnaM dantavizodhanam ॥ na kuryAdbrahmacArI ca tapasvI vidhavA tathA ॥ 8 ॥
hk transliteration by Sanscript