Charles Ellicott Commentary Jeremiah 51:61

"And Jeremiah said to Seraiah, When thou comest to Babylon, then see that thou read all these words," — Jeremiah 51:61 (ASV)

When you come to Babylon, and shall see, and shall read ... —The meaning of the Hebrew would be better expressed by, you shall see to it and read, or see to it and read. The English version, as it is, leaves it doubtful who or what is to be seen.

The verb for “read” implies reading aloud. Seraiah was to read the prophecy to those whom it concerned, probably to a chosen few among his own countrymen. The idea that it was to be read to the Babylonians is in the highest degree improbable.