Had they entered it, they would never have come out of it until the Day of Judgment. Obedience is only in what is right

عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ: بَعَثَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ سَرِيَّةً فَاسْتَعْمَلَ رَجُلًا مِنَ الأَنْصَارِ، وَأَمَرَهُمْ أَنْ يُطِيعُوهُ، فَغَضِبَ، فَقَالَ: أَلَيْسَ أَمَرَكُمُ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنْ تُطِيعُونِي؟ قَالُوا: بَلَى، قَالَ: فَاجْمَعُوا لِي حَطَبًا، فَجَمَعُوا، فَقَالَ: أَوْقِدُوا نَارًا، فَأَوْقَدُوهَا، فَقَالَ: ادْخُلُوهَا، فَهَمُّوا، وَجَعَلَ بَعْضُهُمْ يُمْسِكُ بَعْضًا، وَيَقُولُونَ: فَرَرْنَا إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مِنَ النَّارِ، فَمَا زَالُوا حَتَّى خَمَدَتِ النَّارُ، فَسَكَنَ غَضَبُهُ، فَبَلَغَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ، فَقَالَ: «لَوْ دَخَلُوهَا مَا خَرَجُوا مِنْهَا إِلَى يَوْمِ القِيَامَةِ؛ الطَّاعَةُ فِي المَعْرُوفِ».

‘Ali (may Allah be pleased with him) reported: The Prophet (ﷺ) sent out a detachment and appointed a man from the Ansār as their leader, instructing them to obey him. He became angry and said: Did not the Prophet (ﷺ) command you to obey me? They replied: Yes. He said: Then gather some firewood for me. So they gathered it. He then said: Light a fire, and they did. Then he said: Enter it. They were about to do so, but some held back the others, saying: We fled to the Prophet (ﷺ) to escape from the Fire. They remained like that until the fire went out and his anger subsided. When the Prophet (ﷺ) was informed of this, he said: "Had they entered it, they would never have come out of it until the Day of Judgment. Obedience is only in what is right."

Source · Agreed upon

From the Hadith Encyclopedia (hadeethenc.com).