أَم يَقولونَ افتَراهُ ۚ بَل هُوَ الحَقُّ مِن رَبِّكَ لِتُنذِرَ قَومًا ما أَتاهُم مِن نَذيرٍ مِن قَبلِكَ لَعَلَّهُم يَهتَدونَ

Do they say, “He fabricated it”? No, it is the truth from your Lord, to warn a people who received no prior warning, so they may be guided.