Verses with the word fattest in the Old Testament (2 verses):

Psalms 78:31
The wrath of God came upon them, and slew the fattest of them, and smote down the chosen men of Israel.

Daniel 11:24
He shall enter peaceably even upon the fattest places of the province; and he shall do that which his fathers have not done, nor his fathers' fathers; he shall scatter among them the prey, and spoil, and riches: yea, and he shall forecast his devices against the strong holds, even for a time.