'Retem tree' in the Bible

and he himself hath gone into the wilderness a day's Journey, and cometh and sitteth under a certain retem-tree, and desireth his soul to die, and saith, 'Enough, now, O Jehovah, take my soul, for I am not better than my fathers.'

And he lieth down and sleepeth under a certain retem-tree, and lo, a messenger cometh against him, and saith to him, 'Rise, eat;'