Verses with the word fatlings in the Old Testament (4 verses):

1 Samuel 15:9
But Saul and the people spared Agag, and the best of the sheep, and of the oxen, and of the fatlings, and the lambs, and all that was good, and would not utterly destroy them: but every thing that was vile and refuse, that they destroyed utterly.

2 Samuel 6:13
And it was so, that when they that bare the ark of the LORD had gone six paces, he sacrificed oxen and fatlings.

Psalms 66:15
I will offer unto thee burnt sacrifices of fatlings, with the incense of rams; I will offer bullocks with goats. Selah.

Ezekiel 39:18
Ye shall eat the flesh of the mighty, and drink the blood of the princes of the earth, of rams, of lambs, and of goats, of bullocks, all of them fatlings of Bashan.