Easton's Bible Dictionary (1897)
Resting, an Ephraimite; the father of Amasa, mentioned in 2 Chr. 28:12.
Smith's Bible Dictionary (1863)
(rest of God), a man of Ephraim.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
HAD'LAI (resting), an Ephraimite, father of the chief of a tribe in the reign of Pekah. 2 Chr 28:12.
Hitchcock's Bible Names (1869)
loitering; hindering