Sunan Ibn Majah, Volume 3, Book 9, Hadith 1890 (DarusSalam) ⓘ
It was narrated from Masruq that: Abdullah was asked about a man who married a woman and died without having consummated the marriage with her, nor stipulating the dowry. Abdullah said: “The dowry is hers, and the inheritance is hers and she has to observe the waiting period.” Ma'qil bin Sinan Al-Ashja'i said: “I saw the Messenger of Allah pass a similar ruling concerning Birwa' bint Washiq.” (Sahih) Another chain from 'Alqamah, from Abdullah, with similar wording.
also referenced under: Hadith 1890 (Reference)