Cited from the Qing-dynasty wuxia novel 《
三侠五义》 (Sānxiá Wǔyì, 'Three Heroes and Five Gallants,' chapter 61): 'The Northern Hero, being a man
无牵无挂, could not refuse, and went off with him to Mohua Village.' The phrase fits the wandering-hero archetype perfectly: no family, no debts, free to ride off.