Believe and worship only one god without associating any other being or thing alongside him .

This hadith is about understanding what it means to do wrong in terms of belief. The Prophet Muhammad ﷺ was asked by his companions who among them did not do wrong, and he replied that it does not mean this but rather it means associating others in worship with Allah. He then gave an example from the Quran, where Luqman advised his son not to join others in worship with Allah as this is a great wrong indeed. This hadith teaches us that we should be careful when worshipping God and make sure we are only worshipping Him alone without associating any other being or thing alongside Him. We must also remember that even if we think our actions are small or insignificant, they can still be considered as a great wrong if they involve associating something else alongside God when worshipping Him.