Response to disbelievers' accusations

وَمَا كُنتَ بِجَانِبِ ٱلْغَرْبِىِّ إِذْ قَضَيْنَآ إِلَىٰ مُوسَى ٱلْأَمْرَ وَمَا كُنتَ مِنَ ٱلشَّـٰهِدِينَ

And you, [O Muḥammad], were not on the western side [of the mount] when We revealed to Moses the command, and you were not among the witnesses [to that].