An-Nisa' - 4:154

وَرَفَعْنَا فَوْقَهُمُ الطُّورَ بِمِيثَاقِهِمْ وَقُلْنَا لَهُمُ ادْخُلُواْ الْبَابَ سُجَّدًا وَقُلْنَا لَهُمْ لاَ تَعْدُواْ فِي السَّبْتِ وَأَخَذْنَا مِنْهُم مِّيثَاقًا غَلِيظًا
[4:154]
And We lifted the mountain (Sainai) over them at (the li taking of the covenant) and We said to them: Enter the door making obeisance; and We said to them: Do not exceed the limits of the Sabbath, and We made with them a firm covenant.
And for their covenant we raised over them (the towering height) of Mount (Sinai); and (on another occasion) we said: "Enter the gate with humility"; and (once again) we commanded them: "Transgress not in the matter of the sabbath." And we took from them a solemn covenant.
And We caused the Mount to tower above them at (the taking of) their covenant: and We bade them: Enter the gate, prostrate! and We bode them: Transgress not the Sabbath! and We took from them a firm covenant.