Kautilya's Arthashastra 3.13.9

3.13.9

pretaviṇmūtrocchiṣṭagrāhaṇam āhitasya nagnasnāpanaṃ daṇḍapreṣaṇam atikramaṇaṃ ca strīṇāṃ mūlyanāśakaraṃ, dhātrīparicārikārdhasītikopacārikāṇāṃ ca mokṣakaram //

Employing a slave to carry the dead or to sweep ordure, urine, or the leavings of food; keeping a slave naked; or hurting or abusing him; or violating (the chastity of) a female slave shall cause the forfeiture of the value paid for him or her. Violation (of the chastity) of nurses, female cooks, or female servants of the class of joint cultivators or of any other description shall at once earn their liberty for them. Violence towards an attendant of high birth shall entitle him to run away. When a master has connection with a nurse or pledged female slave against her will, he shall be punished with the first amercement; a stranger doing the same shall be punished with the middlemost amercement. When a man commits or helps another to commit rape with a girl or a female slave pledged to him, he shall not only forfeit the purchase value, but also pay a certain amount of money (sulka) to her and a fine of twice the amount (of sulka to the Government).