אֲשֶׁר אַתָּה מָרְאֶה בָּהָר
The severity of this possible mistake is spelled out clearly in רש"י. Again, this is an easy mistake to make and a difficult one to catch. מָרְאֶה is a strange word you don't see very often. The natural inclination will be to read it מַרְאֶה but that completely changes the word from meaning "shown (by another)" to "show (to others.)" Be aware!