(g hard). The gift of the gab. Fluency of speech; or, rather, the gift of boasting. (French, gaber, to gasconade; Danish and Scotch, gab, the mouth; Gaelic gob; Irish, cab; whence our gap and gape, gabble and gobble. The gable of a house is its beak.)
There was a good man named Job Who lived in the laud of Uz He had a good gift of the gob, The same thing happened us.
Book of Job, by Zach. Boyd.
“Thou art one of the knights of France, who hold it for glee and
pastime to gab, as they term it, of exploits that are beyond human
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894