Saba 34:46

۞قُلۡ إِنَّمَآ أَعِظُكُم بِوَٰحِدَةٍۖ أَن تَقُومُواْ لِلَّهِ مَثۡنَىٰ وَفُرَٰدَىٰ ثُمَّ تَتَفَكَّرُواْۚ مَا بِصَاحِبِكُم مِّن جِنَّةٍۚ إِنۡ هُوَ إِلَّا نَذِيرٞ لَّكُم بَيۡنَ يَدَيۡ عَذَابٖ شَدِيدٖ 46

Say, "I only advise you of one [thing] - that you stand for Allah, [seeking truth] in pairs and individually, and then give thought." There is not in your companion any madness. He is only a warner to you before a severe punishment