Tafsir Ibn Kathir (abridged)
How the Close Friend of Allah, Ibrahim spoke out against Shirk
Here Allah tells us about His servant, Messenger and Close Friend, Ibrahim, upon him be peace, the leader of the pure monotheists. Allah commanded His Messenger Muhammad ﷺ to recite this story to his Ummah so that they could follow this example of sincerity towards Allah, putting one's trust in Him, worshipping Him Alone with no partner or associate, and renouncing Shirk and its people. Allah granted guidance to Ibrahim before, i.e., from a very early age he had denounced his people's practice of worshipping idols with Allah, may He be exalted.
إِذْ قَالَ لاًّبِيهِ وَقَوْمِهِ مَا تَعْبُدُونَ
(When he said to his father and his people: "What do you worship") meaning: what are these statues to which you are so devoted
Continue reading the tafsir of ayahs 69–77