The son of the honest and the nobles will come

Imam al-Sadiq (PBUH) said, "When the period of the suffering of the children of Israel was prolonged, they wailed and cried to Allah for 40 mornings. There upon, Allah revealed to Moses (PBUH) and Aaron (PBUH) to rescue them from the (hands of) Pharaoh.

This way, He reduced the period of their hardship by 170 years." Then, the Imam (PBUH) continued, "This is your case as well, and if you do the same Allah shall certainly relieve us However, if you avoid it, this matter (i.e., the calamity before al-Faraj) shall surely continue up to its last stage...