"Whatever you are doing regarding it"—meaning: regarding what you worship. "Are not—in any way—tempters" (37:162)—he means: you do not have the power, neither you nor those you worship, to lead any of My servants astray, except for those who were already destined in My prior knowledge, decree, and predestination.
﴿مَا أَنتُمْ عَلَيْهِ﴾ على مَا تَعْبدُونَ [﴿بِفَاتِنِينَ﴾ يُرِيد: مَا تقدرون لَا أَنْتُم، وَلَا من تَعْبدُونَ أَن تضلوا أحدا من عبَادي إِلَّا من كَانَ فِي سَابق علمي وقضائي وقدرتي]