Masruq narrates from Sayyiduna Abdullah (may Allah be pleased with him) concerning a man who married, did not fix a dowry, did not consummate the marriage, and died. He said: "She will receive the full dowry, she must observe the waiting period (iddah), and she will also receive inheritance." Then Sayyiduna Ma'qil bin Sinan (may Allah be pleased with him) stood up and said: I bear witness that the Prophet (peace and blessings be upon him) "made this very judgement" concerning Birwa' bint Washiq (may Allah be pleased with her).
This chain is sahih (authentic); Ma'qil bin Sinan is named in it, and he is a well-known Companion. Yazid bin Harun, one of the hadith masters (huffaz), also narrated it likewise through another sahih chain, as did Abd al-Rahman bin Mahdi and others.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14411