Samkin, I checked out other"Господь вседержитель" icons, and the Gospel text is: "Come unto me all ye who labour and are heavy laden and I will give you rest".
"Господь вседержитель" in Church Slavonic is a translation for the Greek Pantocrator.
This is a varient icon of Christ Pantocrator (Greek for Almighty) type. Pantocrator is taken from Rev.1:18: “I am the Alpha and the Omega, says the Lord Who is, and Who was, and Who is to come, the Almighty" (Pantocrator in Greek).
In some icons of Christ, Pantocrator, He is holding a closed Gospel book while in others like this one He is holding an open Gospel book. The icon with the open Gospel is also called “Christ the Teacher” or “Christ the Judge” depending on the Biblical verse.
Because the image is blurred those of us here who can read Church Slavonic cannot make out the Gospel verse.
Here are just some of the various Gospel verses on the icons of “Christ the Teacher” or "Christ the Judge".
1) “I am the Alpha and Omega.” Rev. 1 :18
2. Christ the Judge: “For if you forgive others the wrongs they have done, your Heavenly Father will also forgive you.” Matthew 6:14.
3. Christ the Judge: “Judge not according to appearances, but judge righteous judgment.” John 7:24 & John 7:2.
4. “Come unto me, all ye that labour and are heavy laden, and I will give you rest. For my yoke is light.” Matthew 28:30.
5. “I am the Light of the World.” John 8: 12.