Jataka Tattva · by Mahadeva
Chapter 9 · Marriage: the 7th House
सप्तमविवेकः
नीचारिमूढांशेऽङ्गपे वा द्यूनपे कलत्रान्तरभाक् ।
Say the 7th lord or the lagna (rising sign) lord is in a navamsha (one-ninth part of a sign). The navamsha is its nicha (low point) one, an enemy's, or too close to the Sun. Then the person takes another wife.
शुक्रेज्यौ सपापौ धनास्तारिगौ व्यभिचारी ।
Say Venus and Jupiter are with bad planets. They are in the 2nd, 7th or 6th house. Then the person is unfaithful.
लग्नपे सपापे व्यभिचारी ।
Say the lord of the lagna (rising sign) is with bad planets. Then the person is unfaithful.
लग्नेशेऽङ्गे द्विभार्यो जारो वा ।
Say the lord of the lagna (rising sign) is in the lagna. Then the person has two wives or is unfaithful.