Liturgy for Niddah 145:3

ת"ל (ויקרא טו, כה) או כי תזוב

close to the time of her menstruation.<span class="x" onmousemove="('comment',' Sc. the three consecutive days on which a discharge appears and which subject the woman to the restrictions of a major zabah must be close to (not within) the seven days of the menstruation period, viz., the first three days of the period of zibah. ');">³</span>

Hadran