Sahih al-Bukhari, Hadith 6261 ⓘ
Narrated Abu Hurairah (ra): Allah's Messenger mentioned a person from Bani Israel who took a piece of wood, made a hole in it, and put therein one thousand Dinar and letter from him to his friend. The Prophet said, "(That man) cut a piece of wood and put the money inside it and wrote a letter from such and such a person to such and such a person."
وَقَالَ اللَّيْثُ حَدَّثَنِي جَعْفَرُ بْنُ رَبِيعَةَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ هُرْمُزَ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم أَنَّهُ ذَكَرَ رَجُلاً مِنْ بَنِي إِسْرَائِيلَ أَخَذَ خَشَبَةً فَنَقَرَهَا، فَأَدْخَلَ فِيهَا أَلْفَ دِينَارٍ وَصَحِيفَةً مِنْهُ إِلَى صَاحِبِهِ. وَقَالَ عُمَرُ بْنُ أَبِي سَلَمَةَ عَنْ أَبِيهِ سَمِعَ أَبَا هُرَيْرَةَ قَالَ النَّبِيُّ صلى الله عليه وسلم " نَجَرَ خَشَبَةً، فَجَعَلَ الْمَالَ فِي جَوْفِهَا، وَكَتَبَ إِلَيْهِ صَحِيفَةً مِنْ فُلاَنٍ إِلَى فُلاَنٍ " .
also referenced under: Book 79, Hadith 35 (In-Book) & Volume 8, Book 74, Hadith 277 (USC-MSA)