Sheep

My dear King, family members in this material world go under the names of wife and children, but actually they behave like tigers and jackals. A herdsman tries to protect his sheep to the best of his ability, but the tigers and foxes take them away by force. Similarly, although a miserly man wants to guard his money very carefully, his family members take away all his assets forcibly, even though he is very vigilant.
(SB 5.14.3)

When Rāmacandra entered the forest and Lakṣmaṇa was also absent, the worst of the Rākṣasas, Rāvaṇa, kidnapped Sītādevī, the daughter of the King of Videha, just as a tiger seizes unprotected sheep when the shepherd is absent. Then Lord Rāmacandra wandered in the forest with His brother Lakṣmaṇa as if very much distressed due to separation from His wife. Thus He showed by His personal example the condition of a person attached to women.
(SB 9.10.11)