Usually the hose bib BUT I always use a pressure regulator.
I have had two lines burst before I got religion. We were in the RV waking up both times.
I heard water running in the bathroom though it was DW looked over and she was still sleeping. Weird thing was that coach was lumber for a washer. Which wasn’t there. The 90 you would screw the valves into had a plug screwed in and it developed a crack across he mold mark.
The other time it was a HWH flex hose.
If leaving all day I turn off bib and leave pump on for ice.