(1)Saturn: In astrology, Saturn is often associated with discipline, responsibility, and limitations. It can also represent delays and challenges.  
(2)Neptune: Neptune is linked to spirituality, intuition, and dreams, but also to illusion and confusion.  
(3)Seventh House: The seventh house in astrology is commonly associated with partnerships, marriage, and legal agreements.

Avoiding donating iron when Saturn and Neptune are in the seventh house because they believe this combination could create challenges in relationships or legal matters.