2:242

Al-Baqara 2:242

كَذَٰلِكَ يُبَيِّنُ ٱللَّهُ لَكُمْ ءَايَٰتِهِۦ لَعَلَّكُمْ تَعْقِلُونَ

Kazaalika yubaiyinul laahu lakum aayaatihee la'allakum ta'qiloon

Thus does Allah make clear to you His verses that you might use reason.