Jatakaparijata 13.79

13.79

samanupatitā yasmin bhāge trayaḥ sabudhā grahā bhavati niyamātasyāvāptiḥ śubheṣvaśubheṣu vā |
vraṇakṛdaśubhaḥ ṣaṣṭhe dehe tanorbhasamāśrite tilakamaśakṛddṛṣṭaḥ saumyairyutaśca sa lakṣmavān ||

In whichever division three planets including Mercury coincide, the occurrence of that [mark] is certain, whether among auspicious or inauspicious [forms]. / An inauspicious planet produces a wound; in the sixth house from the sign occupied by the physical body, it produces a mole or birthmark; if aspected by or conjoined with benefics, [the native] bears an auspicious mark.