Reply To: Tfillas HaShla – Erev Rosh Chodesh Sivan (Yom Kippur Katan)

tefilas ha’shla is actually not written by the shla himself. it was written by r’ shabsi sofer, and is known as tefilas ha’shla, because the shla endorsed the tefila and called r’ shabsi sofer “echad mehamidakd’kim”.