Ibrahim narrates from Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) concerning a man who divorced his wife while he was ill: the woman will inherit from the man during the iddah, but the man will not inherit from the woman.
This is munqati' (broken); Mughirah did not hear it from Ibrahim, he only said: Ubaydah mentioned from Ibrahim from Umar; and Ubaydah al-Dabbi is da'if (weak). Moreover, in the narration of Yahya al-Qattan from him, Ubaydah did not trace it back to Umar; he only mentioned it from Ibrahim, and from al-Sha'bi from Shurayh, without Umar (may Allah be pleased with him) in it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 15131