Verbatim · Ayatollah A. Sistani

If you observe blood for the first three consecutive days and there is no stop in the middle, all what you have observed is treated as Haydh. Whatever blood you observe until ten days comes into the category of Haydh and is treated as Haydh. After ten days, the blood seen is considered as Istihadha.

Ayatollah A. Sistani sistani.org Q&A #15546 other marjas may differ

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