Qualcuno può tradurre

I’d be hard – this is a prayer in Old Church Slavonic ( basically 10th Century Slavic )

Hopefully someone with a bit more knowledge of the Bible will come by and tell .

Any way , I’d bet this is either God keep me from harm or something similar , as the words I can make out don’t suggest this to be Our father .

That’s the beginning of a well known prayer/psalm that goes like:

Да воскреснет Бог, и расточатся врази Его, и да бежат от лица Его ненавидящии Его.

Which translates as:

Let God arise, let his enemies be scattered, let them also that hate him flee before him.

Тhe actual Cyrillic script on the cross, however, has some words abbreviated and/or written using different (older) spelling. It was common to use abbreviations in such texts, for example here Бгь = Богъ (meaning God) There are other versions of this cross like e.g. this one:

https://preview.redd.it/kp3r0c8hnnxe1.jpeg?width=600&format=pjpg&auto=webp&s=a5a80b7aafda988a3b4b0b376f12c34105307ab8