Gal 3:19 19 Wherefore then serveth the law? It was added because of transgressions, till the seed should come to whom the promise was made; and it was ordained by angels in the hand of a mediator. (KJV)

The pro-Pauline author of Gal. 3:19 states that angels mediated the Law at Sinai but such a belief has no foundation in Hebrew Scriptures or Rabbinic literature. Stories in the Apocrypha, Pseudepigrapha, Philo, Josephus, Midrash, and Haggadah are non-canonical and non-authoritative to Jews. They do not determine Scriptural interpretation or Jewish practice. This doctrine of angels in the New Testament was put forward to show the remoteness of the God of Israel. It is, in fact, contrary to Jewish belief (Freudmann, Antisemitism in the New Testament, p. 122). This heavy reliance upon "angels" is indicative once again of the Gnostic leanings of the writer of Galatians because the Jewish Scriptures are very explicit that the Law and the Torah was given directly by God Himself:

Exod 20:1-19 1 And God spake all these words, saying, 2 I am the LORD thy God, which have brought thee out of the land of Egypt, out of the house of bondage. 3 Thou shalt have no other gods before me. 4 Thou shalt not make unto thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth: 5 Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me; 6 And shewing mercy unto thousands of them that love me, and keep my commandments. 7 Thou shalt not take the name of the LORD thy God in vain; for the LORD will not hold him guiltless that taketh his name in vain. 8 Remember the sabbath day, to keep it holy. 9 Six days shalt thou labour, and do all thy work: 10 But the seventh day is the sabbath of the LORD thy God: in it thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that is within thy gates: 11 For in six days the LORD made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it. 12 Honour thy father and thy mother: that thy days may be long upon the land which the LORD thy God giveth thee. 13 Thou shalt not kill. 14 Thou shalt not commit adultery. 15 Thou shalt not steal. 16 Thou shalt not bear false witness against thy neighbor. 17 Thou shalt not covet thy neighbor's house, thou shalt not covet thy neighbor's wife, nor his manservant, nor his maidservant, nor his ox, nor his ass, nor any thing that is thy neighbor's. 18 And all the people saw the thunderings, and the lightnings, and the noise of the trumpet, and the mountain smoking: and when the people saw it, they removed, and stood afar off. 19 And they said unto Moses, Speak thou with us, and we will hear: but let not God speak with us, lest we die. (KJV)

As you can read for yourself according to the Jewish Scriptures it was God and not "angels" which gave mankind the Torah and the writer of Galatians chapter 3 has it wrong again!