Sahih al-Bukhari 79:35
Narrated Abu Hurairah (ra):
Allah's Messenger (ﷺ) 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 (ﷺ) 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."
Reference
Sahih al-Bukhari 79:35
In-book reference
Book 79, Hadith 35
Arabic Text
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 ".