Translation:
Provisional translation
O thou who art steadfast in the Covenant! Thy letter was received. Praise be to God, it spoke of steadfastness and firmness beneath the shelter of the Word of God [3.5s]
ای ثابت بر پیمان نامه رسید الحمد لله ناطق بثبوت و رسوخ در ظل کلمه الله بود
