وَما كُنتَ بِجانِبِ الطّورِ إِذ نادَينا وَلـٰكِن رَحمَةً مِن رَبِّكَ لِتُنذِرَ قَومًا ما أَتاهُم مِن نَذيرٍ مِن قَبلِكَ لَعَلَّهُم يَتَذَكَّرونَ

You weren’t at the base of the Mount when We called out. However, it’s an act of mercy from your Lord, to warn a people to whom no warner had come before, so they may become aware.