(Exodus 13:14) "And it shall be if your son asks you tomorrow": "tomorrow" may indicate" in the present," and it may indicate "in time to come." (Exodus 17:9) "Tomorrow I will stand on top of the hill" — in the present. (Joshua 22:24) "Tomorrow your children might say to our children" — in time to come. (It is written, Devarim 6:20) "If your son asks you tomorrow (i.e., in the time to come): What are the testimonies and the statutes, etc.":
It Shall Be If Your Son Asks You
Mekhilta Tractate Pischa 18:23