"Because thou hast kept the word of my
patience, I also will keep thee from the hour
of temptation, which shall come upon all
the world, to try them that dwell upon the
earth." Revelation 3:10

This is the promise to the faithful Church
of Philadelphia; protection from some
serious persecution.

However, the promise, which includes "all
the world", obviously has its fulfillment for
the Church at the end of this age.