וַיֹּ֕אמֶר בָּ֥א אָחִ֖יךָ בְּמִרְמָ֑ה וַיִּקַּ֖ח בִּרְכָתֶֽךָ׃
以撒說：«你弟弟用巧計前來，拿走了你的祝福。»
Sforno
ויקח ברכתך, the blessing that would have been appropriate as suitable and effective for you. The blessing which Yaakov had been given (mistakenly), concerned matters of importance in our material life on this earthy both while in our own land or in the Diaspora. The reason Yitzchok had phrased it thus was because the blessing G’d had given Avraham and which was to be given to one of Yitzchok’s children was not appropriate for Esau. [the latter blessing was given to Yaakov in 28,4 so that Yaakov indeed had secured both blessings. Ed.]