Anandakanda 2.8.71

2.8.71

arkadugdhaiḥ samaṃ piṣṭvā tatkṛte golake kṣipet /
vajraṃ kṣatriyajātīyaṃ pūrvavanmārayed dhruvam //

grinding [them] equally with milky juice of arka, one should insert [the diamond] into a ball made from that; / a diamond of the Kṣatriya class should definitely be killed as described before.