佛說目連問戒律中五百輕重事經 2.195

2.195

問：「鳩雀於人舍內作窠，比丘破。或塞鼠孔。犯何事？」答：「鳩雀未有子得去，有子不得。鼠穴唯有一孔，不得塞。若有內外孔，得塞內者。」

Question: "Doves or sparrows build nests inside a person's house, and a bhikṣu destroys them; or he blocks a mouse hole. What offense is committed?" Answer: "Before the doves or sparrows have offspring, they may be removed; if they have offspring, they must not. If a mouse burrow has only a single hole, it must not be blocked. If it has both inner and outer holes, one may block the inner one."