Sforno on Genesis 49:12/ספורנו על בראשית מ״ט:י״ב

1חכלילי עינים מיין, the fifth of the identifying marks of the Messiah will be the onset of an unusually long period of economic progress, plentiful harvests, etc. This has also been predicted in Psalms 72,16 “let abundant grain be in the land to the tops of the mountains, let his crops thrive like the forest of Lebanon.” Our sages have paraphrased this in Shabbat 30 when they described the affluence in messianic days by crediting the soil of Israel with producing ready to eat rolls and garments made of the finest wool.