No luck here with google (or it's me)

[Politicub]

8. After the president is impeached, the deed has been done.

I haven't seen anywhere in the constitution that says the senate needs to wait on "receiving" the articles of impeachment. The articles will come to exist once they are affirmed by the majority of the house because the person in question has become impeached. Here's what the constitution says about impeachment:

Article I, Section 2, Clause 5 provides:
The House of Representatives ... shall have the sole Power of Impeachment.

Article I, Section 3, Clauses 6 and 7 provide:
The Senate shall have the sole Power to try all Impeachments. When sitting for that Purpose, they shall be on Oath or Affirmation. When the President of the United States is tried, the Chief Justice shall preside: And no Person shall be convicted without the Concurrence of two-thirds of the Members present.

Judgment in Cases of Impeachment shall not extend further than to removal from Office, and disqualification to hold and enjoy any Office of honor, Trust or Profit under the United States; but the Party convicted shall nevertheless be liable and subject to Indictment, Trial, Judgment and Punishment, according to Law.

Article II, Section 2 provides:
[The President] ... shall have power to grant reprieves and pardons for offenses against the United States, except in cases of impeachment.

Article II, Section 4 provides:
The President, Vice President and all civil Officers of the United States, shall be removed from Office on Impeachment for, and Conviction of, Treason, Bribery, or other high Crimes and Misdemeanors.

Source: https://en.wikipedia.org/wiki/Impeachment_in_the_United_States