Ibn Ezra, on Isa 49:11

“And I will make all my mountains a way, and my paths shall be exalted.”

“And I will make all my mountains a way, etc. The mountains will be lowered, and the paths which are low will be exalted. As to the use of the masculine plural ירומון, together with the feminine מסלות, comp. תמצאו ye (daughters of Jerusalem) find (Song 5:8). The origin of the seeming irregularity is to be found in the indifference of the Hebrews as to the use of the plural masculine for the feminine, so long as the idea of plurality is clearly expressed. Others explain the verse thus: Those that will return, will be so numerous, that they will have to walk high on the mountains. According to their opinion ירמון means: they—that will return—will be high, as if the prophet said: they will walk high on my paths (ועל מסלתי)”

Imported from an open dataset — not yet checked against the printed edition.