Matsyapurana 70.54

70.54

tathā ca kāñcanaṃ devaṃ pratigṛhṇandvijottamaḥ
ka idaṃ kasmā adāditi vaidikaṃ mantramīrayet //

'O Keśava! as the Goddess Lakṣmî never remains apart from you, in the same way make my body Your dwelling place.'—53. After that, the Brâhmaṇa, accepting the image of Cupid, should pronounce the following Vedic mantra. ‘Ka Idam Kasmât, &c.’—54.