Quran 7:170 — The Purgatory (Al-A'araf)

Those who uphold the scripture, and observe the Contact Prayers (Salat), we never fail to recompense the pious.

[7:169] Subsequent to them, He substituted new generations who inherited the scripture. But they opted for the worldly life instead, saying, "We will be forgiven." But then they continued to opt for the materials of this world. Did they not make a covenant to uphold the scripture, and not to say about GOD except the truth? Did they not study the scripture? Certainly, the abode of the Hereafter is far better for those who maintain righteousness. Do you not understand?

[7:171] We raised the mountain above them like an umbrella, and they thought it was going to fall on them: "You shall uphold what we have given you, strongly, and remember the contents thereof, that you may be saved."