'Future' in the Bible

[In the celebration of the Passover in future years,] seven days you shall eat unleavened bread, but on the first day you shall remove the leaven from your houses [because it represents the spread of sin]; for whoever eats leavened bread on the first day through the seventh day, that person shall be cut off and excluded from [the atonement made for] Israel.

“In the future, when your son asks you, ‘What does this mean?’ say to him, ‘By the strength of His hand the Lord brought us out of Egypt, out of the place of slavery.

Moses said, "This is what the LORD has commanded: "Set aside one omer of it for future generations, so that they may see the food with which I fed you in the desert when I brought you out of the land of Egypt.'"

Then Moses told Aaron, "Take a jar, fill it with about one omer of manna, and place it in the LORD's presence, to be preserved throughout future generations."