4 occurrences in 4 dictionaries
Reference: Chub
Easton
the name of a people in alliance with Egypt in the time of Nebuchadnezzar. The word is found only in Eze 30:5. They were probably a people of Northern Africa, or of the lands near Egypt in the south.
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Fausets
Eze 30:5. A people named Kufa, on the monuments. Ptolemy (4:2, 5, 9) mentions a Chob-at in Mauritania, and a Chob-ion in the Mareotic nome in Egypt.
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Smith
Chub,
the name of a people in alliance with Egypt in the time of Nebuchadnezzar,
and probably of northern Africa.