וַיֹּ֕אמֶר בָּ֥א אָחִ֖יךָ בְּמִרְמָ֑ה וַיִּקַּ֖ח בִּרְכָתֶֽךָ׃
And he said: ‘Thy brother came with guile, and hath taken away thy blessing.’
Sforno on Genesis
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.]