Al-Kāfi

Hadith 574
burial
5ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ جَمِيلِ بْنِ دَرَّاجٍ قَالَ قَالَ إِنَّ الْجَرِيدَةَ قَدْرُ شِبْرٍ تُوضَعُ وَاحِدَةٌ مِنْ عِنْدِ التَّرْقُوَةِ إِلَى مَا بَلَغَتْ مِمَّا يَلِي الْجِلْدَ وَالأخْرَى فِي الأيْسَرِ مِنْ عِنْدِ التَّرْقُوَةِ إِلَى مَا بَلَغَتْ مِنْ فَوْقِ الْقَمِيصِ.
5. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Jamil ibn Darraj who has said the following: “He (the Imam) has said, ‘Al-Jaridah (twigs of palm tree) are of the size of one Shibr (ten inches) of which one is placed with one end near the collarbones downward as far as it reaches next to the skin, and the other on the left side near the collarbones downward as far as it reaches over the shirt.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī