'Secretly' in the Bible

If your brother, the son of your mother, or your son or your daughter or the wife of your heart, or the friend who is as dear to you as your life, working on you secretly says to you, Let us go and give worship to other gods, strange to you and to your fathers;

But if any man has hate for his neighbour, and waiting for him secretly makes an attack on him and gives him a blow causing his death, and then goes in flight to one of these towns;

Cursed is he who takes his neighbour's life secretly. And let all the people say, So be it.

And to her baby newly come to birth, and to the children of her body; for having no other food, she will make a meal of them secretly, because of her bitter need and the cruel grip of your haters on all your towns.