I heard ʿAbdullah bin Shaqeeq say: ʿUthman ؓ forbade tamattuʿ and ʿAli enjoined it. ʿUthman ؓ said something and ‘Ali ؓ said to him, You know that the Messenger of Allah ﷺ did that. ʿUthman ؓ said: Yes, but we were in a state of fear [at that time]. Shuʿbah said: I said to Qatadah: What were they afraid of? He said: I do not know,
أَنَّ رَسُولَ اللهِ ﷺ فَعَلَ ذَلِكَ؟ قَالَ عُثْمَانُ أَجَلْ وَلَكِنَّا كُنَّا خَائِفِينَ قَالَ شُعْبَةُ فَقُلْتُ لِقَتَادَةَ مَا كَانَ خَوْفُهُمْ؟ قَالَ لَا أَدْرِي