In ancient texts on Indian Astrology there were mention about important combinations which lead to disappointment in the married life. In Astrology, 7th house and its lord represents spouse and partners. Sage Parasara in his ‘Brihat Parasara Hora Sastra’ describes the following points about 7th house:
Separation is indicated when 7th house lord is in the house of its enemy or if 7th lord is debilitated or 7th lord is receiving aspects from malefic planets or is in ‘astangatva’. Astangatva represents nearer or conjunction with Sun.
Separation is indicated if 7th lord is positioned in 6th, 8th or 12th houses and is weak. Here weakness means conjunction with bad planets.
Separation is indicated if the 7th house is being occupied by malefic planets or seen by malefic planets.
Varahamihira in his ‘Bruhajjataka’ adds that If there is a mixer of good and bad planets in the 7th house, the native will have more than one marriage. This view is also supported by Kalayna Varma in his ‘Saaravali’.
Mantreswara in his ‘Phaladeepika’ says: If Venus or 7th lord is hemmed between malefic planets or conjunct with malefic planets or aspect by malefic planets then it is also a sign of losing the partner.
Kalyana Varma in his ‘Saaraavali’ says: Mars in 7th house leads to loss of partner and if that Mars is aspect by Saturn, then death of partner can be predicted.
Let us remember, in Astrology, the planets Saturn, Mars, Sun, Rahu and Kethu are considered natural malefic planets where as the planets Jupiter and Venus are natural benefic. When Saturn or Rahu involve with 7th house affairs, we can say the spouse has past life debts to be repaid in terms of marriage relationship. Saturn and Rahu represent separation, sometimes owing to the death of the spouse. If Mars is involved, then it denotes one of the partners becoming aggressive and wild thus spoiling the relation.