The Messenger of Allah ﷺ said, "The martyr will intercede for seventy members of his household."
حدثنا أحمد بن صالح حدثنا يحيى بن حسان حدثنا الوليد بن رباح الذماري حدثني عمي نمران بن عتبة الذماري قال دخلنا على أم الدرداء ونحن أيتام فقالت أبشروا فإني سمعت
قال رسول الله ﷺ يشفع الشهيد في سبعين من أهل بيته
Its isnad is daif. Ibn Hibban narrated it, 1612, from the hadith of Yahya bin Hassan, with the same wording. See the following hadith, 4905.Nimran was mentioned by Ibn Hibban in al-Thiqat, 7/544, where he said, "Hurayz bin Uthman narrated from him." The statement attributed to Abu Dawud, "The teachers of Hurayz are all reliable," is not established. So Nimran is of unknown status.