Sahih Bukhari Volume 7, Book 67, Hadith 5185

حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، حَدَّثَنَا يَعْقُوبُ بْنُ عَبْدِ الرَّحْمَنِ الْقَارِيُّ، عَنْ أَبِي حَازِمٍ، قَالَ سَمِعْتُ سَهْلَ بْنَ سَعْدٍ، أَنَّ أَبَا أُسَيْدٍ السَّاعِدِيَّ، دَعَا النَّبِيَّ صلى الله عليه وسلم لِعُرْسِهِ، فَكَانَتِ امْرَأَتُهُ خَادِمَهُمْ يَوْمَئِذٍ وَهْىَ الْعَرُوسُ، فَقَالَتْ أَوْ قَالَ أَتَدْرُونَ مَا أَنْقَعَتْ لِرَسُولِ اللَّهِ صلى الله عليه وسلم أَنْقَعَتْ لَهُ تَمَرَاتٍ مِنَ اللَّيْلِ فِي تَوْرٍ‏

Narrated By Sahl bin Sad : Abu Usaid As-Sa'idi invited the Prophet to his wedding party and his wife served him on that day, and she was the bride. She said (or Sahl said), "Do you know what she soaked for Allah's Apostle? She soaked some dates for him (in water) in a drinking bowl overnight."