"Which of us will be the first to following you (in death)?" He said: "The one of you who has the longest arms." They took a stick and started to measure their arms. But Sawdah was the first one to follow him. She was the one who had the longest arms, because she used to give in charity a great deal. (Using translation from Nasāʾī 2541)  

أَنَّ أَزْوَاجَ النَّبِيِّ ﷺ اجْتَمَعْنَ عِنْدَهُ فَقُلْنَ أَيُّنَا أَسْرَعُ لُحُوقَا بِكَ؟ قَالَ «أَطْوَلُكُنَّ يَدًا» فَأَخَذْنَ قَصَبَةً فَجَعَلْنَ يَذْرَعْنَهَا وَكَانَتْ سَوْدَةُ أَسْرَعَهُنَّ بِهِ لُحُوقًا وَكَانَتْ أَطْوَلَهُنَّ يَدًا فَكَانَ ذَلِكَ مِنْ كَثْرَةِ الصَّدَقَةِ