Deuteronomy 4:9

6 and ye have kept and done [them] (for it [is] your wisdom and your understanding) before the eyes of the peoples who hear all these statutes, and they have said, Only, a people wise and understanding [is] this great nation.

7 `For which [is] the great nation that hath God near unto it, as Jehovah our God, in all we have called unto him?

8 and which [is] the great nation which hath righteous statutes and judgments according to all this law which I am setting before you to-day?

9 `Only, take heed to thyself, and watch thy soul exceedingly, lest thou forget the things which thine eyes have seen, and lest they turn aside from thy heart, all days of thy life; and thou hast made them known to thy sons, and to thy sons` sons.

10 `The day when thou hast stood before Jehovah thy God in Horeb -- in Jehovah`s saying unto me, Assemble to Me the people, and I cause them to hear My words, so that they learn to fear Me all the days that they are alive on the ground, and their sons they teach; --

11 and ye draw near and stand under the mountain, and the mountain is burning with fire unto the heart of the heavens -- darkness, cloud, yea, thick darkness:

12 `And Jehovah speaketh unto you out of the midst of the fire; a voice of words ye are hearing and a similitude ye are not seeing, only a voice;