Imam Sadiq (a.s.) informed regarding the verse: And whoever turns away from My reminder, his shall have a straitened life. (Surah Taha (20):124) This condition, by Allah is for the Nasibis (enemies of Ahle Bait).

Muawiyah b. Ammar: May I be sacrificed on you, I have witnessed them leading a long life of prosperity and comfort till their death.
Imam (a.s.): By Allah, there is a terrible condition for them during the Raj’at (return on reappearance of Imam Mahdi (a.t.f.s.)) such that they will eat waste matter.
Tafseer al-Qummi p 424