Sunnan Abu Dawud Collection: ::Book Number 11:: Hadith # 2084
Narrated Abdullah ibn Abbas: About the Quranic verse: "It is not lawful for you forcibly to inherit the woman (of your deceased kinsmen), nor (that) ye should put constraint upon them. When a man died, his relatives had more right to his wife then her own guardian. If any one of them wanted to marry her, he did so; or they married her (to some other person), and if they did not want to marry her, they did so. So this verse was revealed about the matter.