Ex 34:6
34:6 And the LORD passed by before him, and {a} proclaimed, The
     LORD, The LORD God, merciful and gracious, longsuffering,
     and abundant in goodness and truth,

     (a) This refers to the Lord, and not to Moses proclaiming:
         as Ex 33:19.

Ex 34:9
34:9 And he said, If now I have found grace in thy sight, O
     Lord, let my Lord, I pray thee, go among us; {b} for it
     [is] a stiffnecked people; and pardon our iniquity and our
     sin, and take us for thine inheritance.

     (b) Seeing the people are of this nature, the rulers need
         to call on God that he would always be present with his
         Spirit.

Ex 34:12
34:12 Take heed to thyself, lest thou make a covenant with the
      inhabitants of the land whither thou goest, lest it be for
      a {c} snare in the midst of thee:

      (c) If you follow their wickedness, and pollute yourself
          with their idolatry.

Ex 34:13
34:13 But ye shall destroy their altars, break their images, and
      cut down their {d} groves:

      (d) Which pleasant places they chose for their idols.

Ex 34:17
34:17 Thou shalt make thee no {e} molten gods.

      (e) As gold, silver, brass, or anything that is molten: in
          this is condemned all types idols, no matter what they
          are made of.

Ex 34:20
34:20 But the firstling of an ass thou shalt redeem with a lamb:
      and if thou redeem [him] not, then shalt thou break his
      neck. All the firstborn of thy sons thou shalt redeem. And
      none shall appear before me {f} empty.

      (f) Without offering something.

Ex 34:22
34:22 And thou shalt observe the feast of weeks, of the
      firstfruits of wheat harvest, and the feast of ingathering
      {g} at the year's end.

      (g) Which was in September, when the days got shorter,
          that is, the end of their calendar year.

Ex 34:24
34:24 For I will cast out the nations before thee, and enlarge
      thy borders: neither shall any man {h} desire thy land,
      when thou shalt go up to appear before the LORD thy God
      thrice in the year.

      (h) God promises to defend them and theirs, who obey his
          commandment.

Ex 34:26
34:26 The first of the firstfruits of thy land thou shalt bring
      unto the house of the LORD thy God. Thou shalt not {i}
      seethe a kid in his mother's milk.

      (i) See Ex 23:19, De 14:21.

Ex 34:28
34:28 And he was there with the LORD {k} forty days and forty
      nights; he did neither eat bread, nor drink water. And he
      wrote upon the tables the words of the covenant, the ten
      commandments.

      (k) This miracle was to confirm the authority of the law,
          and should not be followed any more than other
          miracles.

Ex 34:34
34:34 But when Moses went in {m} before the LORD to speak with
      him, he took the vail off, until he came out. And he came
      out, and spake unto the children of Israel [that] which he
      was commanded.

      (m) Which was in the tabernacle of the congregation.