The Family Of Imran - 3:77
Those who exchange their pledge to Allah and their oaths for a small price have no share in the Hereafter. Allah will not speak to them, nor will He look upon them on the Day of Resurrection, nor will He purify them. For them is a painful torment.
A promise from the people of the Book:
The Family Of Imran/3:187
"Allah had taken a promise from those to whom the Book was given, saying, "You will certainly make it clear to the people and you will not conceal it."But they threw it behind their backs and sold it for a small price. What an evil exchange!"
The Heights/7:169
"They were replaced by other generations who inherited the Book. But they said, "We shall be forgiven anyway,"and chose vile and transitory benefits. If similar temporary benefits came to them, they would still choose them. Was not a promise taken from them that they would adhere to the Book and speak only the truth about Allah? Have they not read and learned it? Better for the righteous is the abode of the Hereafter. Do you not understand?"
The Cow/2:40
Children of Israel! Remember My favor which I have bestowed upon you, and keep your promise to Me, so that I may keep My promise to you; fear Me alone!
The Cow/2:41
Believe in what I have sent down confirming what is with you. Do not be the first of those who oppose it. Do not exchange My signs for things of little value; fear Me alone.
The Cow/2:42
Do not knowingly confuse the truth with falsehood, and do not conceal the truth.
The Cow/2:146
Those to whom We have given the Book recognize these truths as they recognize their children, yet a group of them knowingly conceal the truth.