Note 565 — Chapter XLV · ASSASSINATION OF ALY. A.H. XL. A.D. 661.
Reading edition
One of the sons died in infancy. The daughters were Zeinab and Omm Kolthûm; but he had, by other mothers, two other daughters whom he called by the same names, i.e. Zeinab the less, and Omm Kolthûm the less.