Once Messenger of Allah ﷺ came out while Bilal was accompanying him. He went towards the women thinking that they had not heard him (i.e. his sermon). So he preached them and ordered them to pay alms. (Hearing that) the women started giving alms; some donated their ear-rings, some gave their rings and Bilal was collecting them in the corner of his garment.  

أَشْهَدُ عَلَى النَّبِيِّ ﷺ أَوْ قَالَ عَطَاءٌ أَشْهَدُ عَلَى ابْنِ عَبَّاسٍ أَنَّ رَسُولَ اللَّهِ ﷺ خَرَجَ وَمَعَهُ بِلاَلٌ فَظَنَّ أَنَّهُ لَمْ يُسْمِعِ النِّسَاءَ فَوَعَظَهُنَّ وَأَمَرَهُنَّ بِالصَّدَقَةِ فَجَعَلَتِ الْمَرْأَةُ تُلْقِي الْقُرْطَ وَالْخَاتَمَ وَبِلاَلٌ يَأْخُذُ فِي طَرَفِ ثَوْبِهِ وَقَالَ إِسْمَاعِيلُ عَنْ أَيُّوبَ عَنْ عَطَاءٍ وَقَالَ عَنِ ابْنِ عَبَّاسٍ أَشْهَدُ عَلَى النَّبِيِّ ﷺ