Rasadhyaya 65

65

pañcavarṇā bhavet śyāmā kālikā kṛṣṇavarṇikā
sadā sūtasya jāyante sahajāḥ sapta kañcukāḥ //

The dark defect may be five-coloured, while the blackish defect is black in colour. / Seven innate sheath defects are always produced in mercury.