At length mercantile emissaries of Khorasan [a land southeast of the Caspian Sea in modern north Iran] told me that there is a kingdom of Judah which is called al-Khazar. But I did not believe these words for I thought that they told me such things to procure my goodwill and favor. I was therefore wondering, till the ambassadors of Constantinople came [between 944 and 949] with presents and a letter from their king to our king, and I interrogated them concerning this matter,
They answered me: "It is quite true, and the name of that kingdom is al-Khazar. It is a fifteen days' journey by sea from Constantinople, but by land many nations intervene between us; the name of the king now reigning is Joseph; ships sometimes come from their country to ours bringing fish, skins, and wares of every kind [The Khazars, great traders, got their wares from the Rus to the north.] The men are our confederates and are honored by us; there is communication between us by embassies and mutual gifts; they are very powerful; they maintain numerous armies with which they occasionally engage in expeditions." When I heard this report I was encouraged, my hands were strengthened, and my hope was confirmed. Thereupon I bowed down and adored the God of heaven. [Hasdai was happy: Christians could no longer say the Jews were without a country as a punishment for their rejection of Jesus.]….
I pray for the health of my lord the King, of his family, and of his house, and that his throne may be established for ever. Let his days and his sons' days be prolonged in the midst of Israel!