Guru aaya lagan mein kharab jo ho jaye, Ketu ko marwa ke khud faqeeri paye.
Jupiter came in the Ascendant, if it becomes bad/afflicted; it gets Ketu killed and attains poverty/ruin itself.
Jupiter in the 1st house is usually a blessing, but what happens when it turns negative? Dr. Sharma explains the terrifying chain reaction of an afflicted Jupiter.
If Jupiter in the 1st house is corrupted (by bad deeds or enemy planets), it doesn't just harm itself. It directly attacks and "kills" Ketu (which represents the son, the feet, and spiritual salvation).
Once Ketu is destroyed ("Ketu ko marwa ke"), the person loses their foundation and their legacy. The ultimate result is that the native is stripped of all wealth and respect, forced into a life of miserable poverty and wandering ("khud faqeeri paye").