As per the below wiki link, crossing the ocean is considered a taboo in hinduism.
https://en.m.wikipedia.org/wiki/Kala_pani_(taboo)
The link gives quote from a dharmashastra which prohibits crossing the ocean. I am not sure how this is interpreted by commentators. Is it true that crossing the ocean is considered taboo? Does this have strong basis in the scriptures?
Edit: I am looking for all the references from scriptures which prohibit crossing the ocean.