What is Eundo Morando, Et Redeundo?

Legal Definition
This Latin phrase signifies going, remaining, and returning. It is employed in cases where a person either as a party, a witness, or one acting in some other capacity, as an elector, is privileged from arrest, in order to give him that freedom necessary to the performance of his respective obligations, to signify that he is protected from arrest eundo, morando et redeundo. See 3 Bouv. Inst. n. 3380.
-- Bouviers Law Dictionary
Legal Definition
Lat. Going, remaining, and returning. A person who is privileged from arrest (as a witness, legislator, etc.) is generally so privileged eundo, morando, et redeundo; that 1s, on his way to the place where his duties are to be performed, while he remains there, and on his return journey.
-- Black's Law Dictionary
Legal Definition
In going, staying and returning.
-- Ballentine's Law Dictionary