Al-Qasas - 28:86

وَمَا كُنتَ تَرْجُو أَن يُلْقَى إِلَيْكَ الْكِتَابُ إِلَّا رَحْمَةً مِّن رَّبِّكَ فَلَا تَكُونَنَّ ظَهِيرًا لِّلْكَافِرِينَ
[28:86]
And you did not expect that the Book would be inspired to you, but it is a mercy from your Lord, therefore be not a backer-up of the unbelievers.
And thou hadst not expected that the Book would be sent to thee except as a Mercy from thy Lord: Therefore lend not thou support in any way to those who reject (Allah's Message).
Thou hadst no hope that the Scripture would be inspired in thee; but it is a mercy from thy Lord, so never be a helper to the disbelievers.