You set the trap when the rat has gone.
More Rwandan Proverbs:
You can outdistance that which is running after you, but not what is running inside you.Rwandan
Hens keep quiet when the cock is around.
Rwandan
What itches in the daughter's skirt, itches also in her mother's.
Rwandan
Pregnancy and fire cannot be kept secret.
Rwandan
When the child falls the mother weeps; when the mother falls the child laughs.
Rwandan
When the leopard is away, his cubs are eaten.
Rwandan