Abu Ishaq reported from Abu Al-Ahwas from ‘Abdullah [Ibn Mas‘ud], who said: “When the people of Ibrahim went out to their festival, they passed by him and said, ‘O Ibrahim, are you not coming out with us?’ He said, ‘I am sick.’” It was only the day before that he had said, “By Allah, I shcill plot a plan for your idols after you have gone away and tumid your backs.” Some of the people heard him.

“When Ibrahim swore an oath that he would plot against their idols, he waited until they had gone away and turned their backs, then he went out to their festival. They had a festival which they would go out to celebrate. Abu Ishaq reported from Abu Al-Ahwas from ‘Abdullah [Ibn Mas‘ud], who said, “Ibrahim went out to their festival and they passed by him and said, ‘O Ibrahim, are you not coming out with us?’ He said, ‘I am sick.’” It was only the day before that he had said, “By Allah, I shcill plot a plan for your idols after you have gone away and tumid your backs.” Some of the people heard him, and they plotted against his gods. He broke them to pieces, except for the biggest idol, which he left.
This is why he said,

{So he broke them to pieces, except the biggest of them, that they might turn to it.} It was said that he put a hammer in the hands of the biggest idol so that the people would think that it had become jealous on its own account and objected to these smaller idols being worshipped alongside it, so it had broken them.

When they came back and saw what Ibrahim had done to their idols, humiliating them and lowering their status, proving that they were not divine and that those who worshipped them were fools.

because of this action of his.

Those who had heard him swearing to plot against them said, we heard a young man talking about them, and they said that he was called Ibrahim.

meaning, in front of a large audience so that all the people could be present. This was Ibrahim’s ultimate purpose, so that he could tell this great gathering about the extent of their ignorance and how foolish they were to worship idols which could not defend themselves from harm or help themselves, so how could they ask them for help?

{They said : "Are you the one who has done this to our gods. O Ibrahim?'' He said: “Nay, this one, the biggest of them did it...")
referring to the one he had left alone and had not broken.

{Ask them, if they can speak!) He was hoping that they would admit of their own volition that these idols could not speak and that this idol would not say anything because it was inanimate. In the Two Sahihs it was recorded from Abu Hurayrah that the Messenger of Allah said:

«Ibrahim , upon him be peace, did not tell lies except on three occasions, two for the sake of Allah - when he said:

and when he said:

{Verily, I am sick} [37:89].

«and when he was traveling in the land of one of the tyrants, and Sarah was with him; when he made camp, a man came to the tyrant and said, "A man has made camp in your land and with him is a woman who is the most beautiful of people.” The tyrant sent for Ibrahim, and asked him, "Wltat is the relationship of this woman to you?" He said, “ She is my sister." The tyrant said, "Go and send her to me." So Ibrahim went to Sarah and said, "Tins tyrant asked me about you, and I told him that you are my sister, so do not let him think that J am lying. For you are indeed my sister according to the Book of Allah, and there are no Muslims on the earth apart from you and I." So Ibrdltlm brought her to him, then he stood and prayed. When she entered upon the tyrant, he reached for her desirously once he saw her. But he suffered a severe seizure. So. he said, "Pray to Allah for me and 1 will not harm you." So she prayed for him and it released him . Then he reached far her desirously, but he was stricken similarly before or worse. This continued three times, and each time he said the same as he had said the first time. Then he called the closest of his guards and said, "You have not brought me a human being, you have brought me a devil! Take her out and give her Hajar. So she was taken out and given Hajar, and she went back. When Ibrahim realized that she had come back, he finished his prayer and turned around. He said, "Wlrat happened?" She said, “Allah took care of the evil disbeliever's plot, and he gave me Hajar as a servant."»

Muhammad bin Sirin said, “When Abu Hurayrah narrated this Hadith, he said, This is your mother, O sons of the water of the heaven.’”