Narrated from Ja'far ibn Muhammad ibn Hakim, from Jamil ibn Darraj, from Zurarah:
Abu Ja'far عليه السلام said: "The woman in a state of istihadah (prolonged irregular bleeding) should observe precaution by delaying for a day or two."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 425