﴿ وَمَا كُنتَ تَرْجُوٓا۟ أَن يُلْقَىٰٓ إِلَيْكَ ٱلْكِتَٰبُ إِلَّا رَحْمَةًۭ مِّن رَّبِّكَ ۖ فَلَا تَكُونَنَّ ظَهِيرًۭا لِّلْكَٰفِرِينَ ﴾

“Now [as for thyself, O believer,] thou couldst never foresee that this divine writ would [one day] be offered to thee: but [it did come to thee] by thy Sustainer’s grace. Hence, never uphold those who deny the truth [of divine guidance],”

Please check ayah 28:88 for complete tafsir.