אז ישיר משה ובני ישראל את השירה הזאת לד'
The verb yashir, he sang [will sing] is written in the future tense, although it is clearly a reference to an event which had already taken place. Rashi explains that the future tense is related to a past occurrence, the time that Moshe Rabbeinu first considered singing. In an alternative exposition, he quotes Chazal, who interpret yashir as referring to an event which will yet take place in the future. This pasuk is a remez, allusion, that the axiom, Techiyas HaMeisim min haTorah, the Resurrection of the Dead, is referenced in the Torah. Indeed, Moshe and all Yisrael sang then,…