For someone (agent muɴ-, -um- & theme i-) to stop by a given object, person, place or location (loc ref -on) in passing.
Idag'uhmuh Patti' ta tigom un way linalā'i ta mumbatāwelda.
Stop by Patti' in passing to see if there are any men to pole-center-carry.
Stopping by an object is typically for the purpose of picking it up to take with one.
Dag'ūhom din pāguy hi payaw'u hi un'a umanāmut.
Stop by (and pick up) the rice in my pond field in passing when you come home.
Dumag'uh'a Anghābon hi habhābung ya inyālim.
Anghābon, stop by the flowers in passing and bring them.
For someone (agent & inst) to bring by someone or something (theme i-) in passing.
Typically the object of bringing someone or something by is to leave him or it behind as one passes.