The Chapter of Condolences and Grief During Calamities, Visiting Graves, Lamentation and Mourning Gatherings

Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said: "No one should observe mourning (ḥidād) for more than three days, except for a woman mourning her husband, as She must continue her mourning until the completion of her 'iddah (waiting period).”