'Secretly' in the Bible

“If your brother, the son of your mother, or your son or daughter, or the wife you cherish, or your friend who is as [precious to you as] your own life (soul), entices you secretly, saying, ‘Let us go and serve other gods’ (gods whom neither you nor your fathers have known,

‘Cursed is he who strikes his neighbor in secret.’ And all the people shall say, ‘Amen.’

and toward her afterbirth that comes from between her legs and toward the children whom she bears; for she will eat them secretly for lack of anything else, during the siege and the misery by which your enemy will oppress you in your cities.