Allah's Apostle ﷺ forbade me to recite the Qur'an while I am in ruku; and the wearing of gold and clothes dyed in saffron. (Using translation from Muslim 2078b)   

أَنَّهُ سَمِعَ عَلِيَّ بْنَ أَبِي طَالِبٍ ؓ يَقُولُ نَهَانِي النَّبِيُّ ﷺ عَنِ الْقِرَاءَةِ وَأَنَا رَاكِعٌ وَعَنْ لُبْسِ الذَّهَبِ وَالْمُعَصْفَرِ  

[Machine] "Al-Miqdam, O Mu'awiyah, if I am telling the truth, then believe me, and if I am lying, then refute me." He said, "Okay, I will." He said, "I swear to you by Allah, did you hear the Messenger of Allah ﷺ forbid wearing gold?" He said, "Yes." He said, "I swear to you by Allah, do you know that the Messenger of Allah ﷺ forbade wearing silk?" He said, "Yes." He said, "I swear to you by Allah, do you know that the Messenger of Allah ﷺ forbade wearing the skins of wild animals and riding on them?" He said, "Yes."  

الْمِقْدَامُ يَا مُعَاوِيَةُ ‍‍‍ إِنْ أَنَا صَدَقْتُ فَصَدِّقْنِي وَإِنْ أَنَا كَذَبْتُ فَكَذِّبْنِي قَالَ فَافْعَلْ قَالَ فَأَنْشُدُكَ بِاللهِ هَلْ سَمِعْتَ رَسُولَ اللهِ ﷺ يَنْهَى عَنْ لُبْسِ الذَّهَبِ؟ قَالَ نَعَمْ قَالَ فَأَنْشُدُكَ بِاللهِ هَلْ تَعْلَمُ أَنَّ رَسُولَ اللهِ ﷺ نَهَى عَنْ لُبْسِ الْحَرِيرِ؟ قَالَ نَعَمْ قَالَ فَأَنْشُدُكَ بِاللهِ هَلْ تَعْلَمُ أَنَّ رَسُولَ اللهِ ﷺ نَهَى عَنْ لُبْسِ جُلُودِ السِّبَاعِ وَالرُّكُوبِ عَلَيْهَا؟ قَالَ نَعَمْ  

[Machine] Omar kept calling me, so I came with the Qibah from the corners of Shirk, he said, then he said, remove this gold from it.  

كَانَ عُمَرُ ؓ لَا يَزَالُ يَدْعُونِي فَآتِي بِالْقِبَاءِ مِنْ أَقْبِيَةِ الشِّرْكِ قَالَ فَقَالَ انْزِعْ هَذَا الذَّهَبَ مِنْهَا