Reference for Niddah 22:56

בד"א לטהרות אבל לבעלה מותרת

once, for R. Zera citing R. Abba b. Jeremiah who had it from Samuel stated, 'A woman who had no settled period may not perform marital intercourse before she has examined herself'<span class="x" onmousemove="('comment',' Infra 12b. ');">⁵⁰</span>

Jastrow

Jastrow

Jastrow

Jastrow