TgO Gen49:25 :בִרכָן דְנָגְדָן מִמַעֲמַקֵי ארעא מִלְרַע‏ : blessings that flow from the depths of the earth below
See the entire entry for maˁămaq, maˁămqā n.m. depth

TgO Gen49:25 :בִרכָן דְנָחֲתָן מִטַלָא דִשמַיָא‏ : blessings that descend from the dew of heaven
See the entire entry for nḥt vb. to descend