Skandapurana 5.57.8

5.57.8

strīhatyayā samāyuktastvaṃ ca nūnaṃ bhaviṣyasi..
pramāṇaṃ yadi dharmo'tra smṛtiśāstrasamudbhavaḥ .. 8 ..

And you will surely be tainted with the sin of killing a woman, / if the dharma arising from the smṛti scriptures is authoritative here.”