﴿ ۞ قُلْ إِنَّمَآ أَعِظُكُم بِوَٰحِدَةٍ ۖ أَن تَقُومُوا۟ لِلَّهِ مَثْنَىٰ وَفُرَٰدَىٰ ثُمَّ تَتَفَكَّرُوا۟ ۚ مَا بِصَاحِبِكُم مِّن جِنَّةٍ ۚ إِنْ هُوَ إِلَّا نَذِيرٌۭ لَّكُم بَيْنَ يَدَىْ عَذَابٍۢ شَدِيدٍۢ ﴾

“Say: “I counsel you one thing only: Be [ever­ conscious of] standing before God, whether you are in the company of others or alone; and then bethink yourselves [that] there is no madness in [this pro­phet,] your fellow-man: he is only a warner to you of suffering severe to come.””

Say ‘I will give you just one piece of admonition namely that you rise up for God in other words for His sake in twos and individually and then reflect and realise that there is no madness in your companion Muhammad (s). He is just a warner to you before the befalling of a severe chastisement’ in the Hereafter if you disobey him.