Kommentar zu Bereschit 19:31

אבינו זקן OUR FATHER IS OLD — And if not now, when? He may die or may cease to beget children.

ואיש אין בארץ, they thought that the whole universe had been turned upside down and that G’d had brought on a deluge of fire.

AND THE FIRST-BORN SAID. Rabbi Abraham ibn Ezra said, “It is possible that Lot had another wife²⁶⁶Since Scripture mentions that Lot had married daughters (Verse 14), these two mentioned here must surely have been younger ones as it was customary for the older ones to marry before the younger ones. (See further, 29:26.) If so, how does Scripture call one of the single daughters the first-born? It must therefore be, concluded Ibn Ezra, that the ones mentioned above were from another wife who had died. Ramban, however, differs with this suggestion, as explained below in the text. who died before.”
But there is no need for this; the first-born is just in contrast to the younger. In fraternal relations the one who is older is called “first-born,” and all those younger than he are called “the younger ones.”
Thus the first fruits of the year are called bikurim;²⁶⁷Bikurim has as its root the word b’chor (the first born). Here also the first fruits are relative to this year’s crop. likewise, the first-born of the poor,²⁶⁸Isaiah 14:30. meaning the most destitute, the poor of the poor. Likewise, With the loss of his first-born shall he lay the foundation thereof, and with the loss of his younger shall he set up the gates of it.²⁶⁹Joshua 6:26. Onkelos also here translated, rabtha.²⁷⁰“The older.” And he did not translate, as elsewhere, buchra (the first-born).