Here is a benefit that mentions the fact that one sacrifice is sufficient for those that have more than one family.
It is taken from a lecture titled: The Virtue of The First Ten Days of Dhul Ḥijjah and Regulations of ʿEid al-Aḍḥa delivered by Abu Hakeem Bilal Davis (hafidhahullah Ta'ala), for our brothers and sisters at MPUBS.
It has been digitally edited before being posted below, walhamdulillah!
Abu Hurairah (رضي الله عنه) narrated that the Prophet ﷺ said: "Whoever invites to guidance will be rewarded like those who follow him in the guidance are rewarded, and that will not decrease the reward of those who have followed him." [Collected by Imām Muslim]
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