﴿ إِنَّ عِبَادِى لَيْسَ لَكَ عَلَيْهِمْ سُلْطَٰنٌ إِلَّا مَنِ ٱتَّبَعَكَ مِنَ ٱلْغَاوِينَ ﴾

“verily, thou shalt have no power over My creatures- unless it be such as are [already] lost in grievous error and follow thee [of their own will]:”

Please check ayah 15:44 for complete tafsir.