Siman 469

(26.) Regarding what they were conversing before him about a certain widower before Pesach — he said that Pharaoh was also a widower, for he was left alone without his army — for "not one of them remained" [Psalms 106]. And we understood from his words that he was hinting to us a remez [hint] — for echod mayhem lo [not one of them] is an acronym of almon [widower]. And the words are sealed.