1 Samuel 23:22 Please go make yet more sure, and know and see his place where his haunt is, and who has seen him there; for it is told me that he deals very subtly. (WEB JPS ASV)
Psalms 105:25 He turned their heart to hate his people, To deal subtly with his servants. (ASV)
Jeremiah 9:4 Take ye heed every one of his neighbour, and trust ye not in any brother; for every brother acteth subtly, and every neighbour goeth about with slanders. (JPS)