Jesus used a question to teach the disciples. AT: "Suppose one of you has ... to set before him'." or "Suppose you have ... to set before him'." (See: [[rc://en/ta/man/translate/figs-rquestion]])
"let me borrow three loaves of bread" or "give me three loaves of bread and I will pay you later." The host does not have any food ready to give to his guest.
Bread is often used to represent food in general. AT: "enough cooked food for a meal" or "enough prepared food for a person to eat" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
It is implied that the visitor has come far from his home. AT: "was traveling and just came to my house" (See: [[rc://en/ta/man/translate/figs-explicit]])
The abstract noun "persistence" can be translated as "persist" or "continue to ask." AT: "because you persist shamelessly" or "because you boldly continue to ask him" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])