G'mornin'
Now let's get to work... and pass it on.
Under rule 9 in the original Senate Rules: "The previous question being moved and seconded, the question from the chair shall be, "Shall the main question be now put?" and if the nays prevail, the main question shall not then be put. Rule 9."
This is referenced in Thomas Jefferson's renowned "manual" that he wrote when leading the Senate as Adam's VP.
An explanation of 'the previous question' (which is still used by the House):
"The Previous Question. At the end of the hour, or at least after any time that the minority floor manager controls has been consumed or yielded back, the majority floor manager can be expected to move the previous question on the bill. This nondebatable motion proposes to end the debate on the bill, to preclude amendments to the bill, and to bring the House to a vote on passing the bill without intervening motions, except for the possibility of motions to adjourn or to table the bill or to recommit to committee.
The motion to order the previous question requires only a simple majority vote for adoption, and the motion rarely is defeated. As a result, debate under the one-hour rule rarely continues for more than one hour in total, not one hour for each Member. "