וּלְיוֹסֵ֣ף אָמַ֔ר מְבֹרֶ֥כֶת יְהֹוָ֖ה אַרְצ֑וֹ מִמֶּ֤גֶד שָׁמַ֙יִם֙ מִטָּ֔ל וּמִתְּה֖וֹם רֹבֶ֥צֶת תָּֽחַת׃
And of Joseph he said: Blessed of the LORD be his land; For the precious things of heaven, for the dew, And for the deep that coucheth beneath,
Sifrei Devarim
(Devarim 33:13) "And of Joseph he said: 'Blessed of the L-rd is his land'" — whence we are taught that the land of Joseph was the most blessed of all the lands.