Reference for Niddah 24:11

רבי חנינא בן אנטיגנוס אומר

Her husband, furthermore, must divorce her and may never marry her again; so R. Meir. R. Hanina b. Antigonus ruled: She must use two testing-rags when she has marital intercourse; they render her unfit<span class="x" onmousemove="('comment',' If any blood is observed on them. ');">¹⁰</span>

Jastrow

Jastrow