What is the difference between “تعبدون” (you worship) in Surat Ash-Shu'ara (26:75) and “يعبدون” (they worship) in Surat Adh-Dhariyat (51:56)?

The fatwa clarifies the difference between the two noble verses: "what you used to worship" in Surah Al-Shu'ara is from the words of Abraham, peace be upon him, to his people, reproaching them for their worship of idols. As for "except that they should worship Me" in Surah Adh-Dhariyat, it is from the words of Allah Almighty, teaching His servants the purpose of their creation, which is to worship Him alone, without any partner.