Rashi on Numbers 14:11/רש"י על במדבר י״ד:י״א

1עד אנה means HOW LONG (while אנה is used of place — “where”, עד אנה denotes time - "until when").

2ינאצני means [HOW LONG] WILL THEY PROVOKE ME TO ANGER.

3בכל האתות FOR ALL THE SIGNS — This means: On account of all the signs which I have done for them they ought to have believed that I possess the ability to fulfill My promise.