Ibn Ezra on Ki Sisa 32:17

English: AND WHEN JOSHUA HEARD. And when Joshua, who remained at the foot of the mountain, heard. AS THEY SHOUTED. The word be-re’o (as they shouted) is related to the word tru’ah (shouting). 97 The root of tru’ah is resh, vav, ayin . The root of be-re’o is yod, resh, ayin . However, both roots are related because the vav and yod interchange, as does their place in the stem (Weiser). As the word de’iy (my knowledge) in I will fetch my knowledge from afar (Job. 36:3) is derived from yada , so is the word yara derived from re’o . 98 This appears to be a scribal error, for it is not consistent with de’iy (my knowledge) being derived from the root yod, dalet, ayin . Hence Weiser and Krinsky suggest emend