"The walls are watching."

Translation: दीवारें देख रही हैं।

[silv1991]

Is this the hindi equivalent of "walls have ears"?

[abordaz]

probably, yes

[LinguisticBoi]

No, they have eyes

[ATHARVA_____S]

they see you when ur sleeping
they know when your awake
they know ur darkest secrets
so make sure they don't get cake

[Maheshwara19]

How is "divar" feminine?

[atooshka]

It is similar to kitab. Kitab becomes kitabe. Divar becomes divare.