The late Tabarsi quoting from the Holy Prophet (P) in the...
The late Tabarsi quoting from the Holy Prophet (P) in the book "Makarim al-Akhlaq" states: "The daughters and sons of Ali (P) and Ja'far are compatible with each other, for this reason Her Eminence Zeinab (P) got married with Abdullah ibn Ja'far while His Holiness could easily select a spouse for his daughter from among the rest of the people. However he has a special sensitivity towards Her Eminence Zahra (P).
The lesson is that the selection of a matching spouse must be considered in proportion to one’s potentiality and capability. Who will be a matching spouse for the lady of the two worlds? Of course, it is the prince of the two worlds. Her Eminence Zahra (P) had other sisters brought up in the lap of the Prophethood however, for particular reasons, they could not attain a prominence such as hers. This is why the Holy Prophet (P) had no such sensitivity towards them.