52 The word in the text is פְדֻת (pédut, “redemption”). This would give the sense of making a distinction by redeeming Israel. The editors wish to read פְלֻת (pélut) instead—“a separation, distinction” to match the verb in the preceding verse. For another view, see G. I. Davies, “The Hebrew Text of Exodus VIII 19 [English 23]: An Emendation,” 24 (1974): 489–92.
53 Heb “this sign will be tomorrow.”

In other versions

Thus I will put a division between my people and your people. Tomorrow this sign shall happen.” ’ ”

I will make a distinction between my people and your people. This sign will occur tomorrow.’ ”

I will make a distinction between my people and your people. This sign will take place tomorrow.”

I will make a clear distinction between my people and your people. This miraculous sign will happen tomorrow.’ ”

And I will put a distinction between my people and your people; this sign will be tomorrow.’ ”

And I will put a division between my people and thy people: to morrow shall this sign be.

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