Translation:
Provisional translation
O Zayn, upon whom rest My glory and My loving-kindness! There hath reached the presence of the Wronged One the letter that was sent unto thee from him who was named Husayn [3.5s]
یا زین علیک بهائی و عنایتی قد حضر لدی المظلوم الکتاب الذی ارسل الیک من سمی بالحسین
