Quran 2:76 — The Heifer (Al-Baqarah)

And when they meet the believers, they say, "We believe," but when they get together with each other, they say, "Do not inform (the believers) of the information given to you by GOD, lest you provide them with support for their argument concerning your Lord. Do you not understand?"

[2:75] Do you expect them to believe as you do, when some of them used to hear the word of GOD, then distort it, with full understanding thereof, and deliberately?

[2:77] Do they not know that GOD knows everything they conceal, and everything they declare?