Jataka Tattva · by Mahadeva
Chapter 9 · Marriage: the 7th House
सप्तमविवेकः
अंशादारे राहौ गृहे स्त्री विधवा ।
Count from the navamsha (one-ninth part of a sign) of the atmakaraka (the planet that stands for the self). Say Mars and Rahu are in the 7th house from it. Then the wife is a widow. (It can also be read: only Rahu is in the 7th house from it, and Mars is not named.)
षष्ठाष्टाङ्केशाः सपापाः पापदृष्टाः स्त्री जारिणी ।
Say the lords of the 6th, 8th and 9th houses are joined with bad planets. Bad planets also aspect them. Then the wife is unfaithful.
अष्टमेशेऽष्टमे स्त्री जारिणी ।
Say the 8th lord is in the 8th house. Then the wife is unfaithful.
मन्देऽस्ते कुदारः ।
Say Saturn is in the 7th house. Then the person gets a bad wife.