Musannaf Ibn Abi Shaybah 20182 — A man with several wives who divorces

Al-Sha'bi (may Allah have mercy on him) said: A man had four wives; he divorced one of them and married another woman, then he died, and it was not known whom he had divorced. In this case, three-quarters of the (wives') inheritance will go to the first four wives, and the fifth will receive one quarter.