블로그 - Rojat 사이트 하디스-The appearance of the Mahdi (Ajal allahu ta’ala farajaho shareef) has five signs in the hadith from Aba Abdillah al-Imam al-Husayn bin Ali (alayhi as-salam)

لِلْمَهْدٖيِ خَمْسُ عَلاٰماٰتٍ: السُّفْياٰنٖيُّ، وَالْيَماٰنٖيُّ، وَالصَّيْحَةُ مِنَ السَّماٰءِ، وَالْخَسْفُ بِالْبَيْداٰءِ، وَقَتْلُ النَّفْسِ الزَّكِيَّةِ. For the appearance of the Mahdi there are five signs: 1. the Sufyani; 2. the Yamani; 3. a heavenly cry; 4. a sinking/collapse in the land called al-Bayda; 5. the killing of an-nafs al-zakiyya (the Pure Soul).