Impeachment in the senate: Would a bare minimum for a quorum suffice?

[commasense]

Over in this thread, I asked the same question, and Saint Cad said this:

@Saint_Cad

Those talking about absent members, it is illegal for a congress member to not attend a session without permission of the presiding officer and can compel absent members to attend. I doubt Roberts would excuse any Senator except under dire circumstances.

However, he gives no cite.