﴿ وَلَقَدْ ءَاتَيْنَا مُوسَىٰ وَهَٰرُونَ ٱلْفُرْقَانَ وَضِيَآءًۭ وَذِكْرًۭا لِّلْمُتَّقِينَ ﴾

“AND, INDEED, We vouchsafed unto Moses and Aaron [Our revelation as] the standard by which to discern the true from the false, and as a [guiding] light and a reminder for the God-conscious”

Please check ayah 21:50 for complete tafsir.