Hadees-e-Lauh: Imam Musa al-Kazim (a.s.)

Appointed after him (Imam Sadiq (a.s.)) Musa (in whose time) there will be  a severe calamity because the path of My obedience will not cut off and my Hujjat will not be hidden.

- Hadees-e-Lauh, al-Kafi, vol. 1, p. 528 -