Brihajjataka 5.26

5.26

samanupatitā yasmin bhāge trayaḥ sa budhā grahā bhavati niyamāt tasya avāptiḥ śubheṣv aśubheṣu vā/
vraṇa kṛd aśubhaḥ ṣaṣṭhe dehe tanor bha samāśrite tilakam aśakṛd dṛṣṭaḥ saumyair yutaś ca sa lakṣmavān//(hariṇī)E5

In whichever division three planets including Mercury fall, the acquisition of that [mark or wound] invariably comes to pass, whether in good or bad circumstances;
a malefic in the sixth house causes a wound on the body corresponding to the sign of the ascendant; aspected by benefics and conjoined [with them], it repeatedly becomes a mole bearing a mark.