Eundo, Morando, Et Redeundo
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
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.