Hadith.403 - Imam Jafar ibn Muhammad Al-Sadiq عليه السلام was asked about placing the palm branch (jareedah) in the grave,
Imam عليه السلام replied: "There is no issue (with it)”.
It means that if Jaridatayn were found after the deceased has been buried in their grave or if someone is present from whom taqiyya is necessary, and thus it is not possible that the Jaridatayn be placed inside the shroud as reported; instead, they should be placed with the deceased however possible.