Its a 2 trillion US dollar bill, 883 pages long.

And amendments to it are likely to be made

We have been down this path of getting indications of when voting will happen (on other occasions) and for those expectations to fall through - but the one hour suggestion is where we are at right now.

Adding what I said prior:

The bill will head to the House for a vote once (if) the Senate passes it.
House leader Pelosi has already indicated a House vote will be at least 24 hours away: