That's absurd. Ignoring the sheer scale of the loan, there's no path for repayment. People don't tend to make loans when they don't expect to get the money back (with interest). Assuming someone lined up to loan Bezos $250 billion and gave him a ridiculously-generous 1% APR and 30-year term, the quarterly payments would be over 2.4 billion, or nearly 5 times as much as they just posted in their best profit ever.
So who exactly do you think has pockets deep enough to fund this 250 billion loan and accountants so terrible they can't see how badly it's going to go?