KJV - 34 Therefore now go, lead the people unto the place of which I have spoken unto thee: behold, mine Angel shall go before thee: nevertheless in the day when I visit I will visit their sin upon them.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
There are many scriptures related to Ex 32:34 which mentions the Angel of The Lord , The Angel of his presence, The Pillar of cloud and The Pillar of light. The scriptures are,Ex. 13:21-22, 14:19; NM. 20:16, Neh. 9:12, Ps 78:14, 99:7, Isa 63:9, 1 COR 10:4.
This Angel is The Lord himself. Ex 13:21 And The Lord went before them by day in a pillar of cloud to lead them along the way and in a pillar of fire to give light that they may travel by day and by night.
The Angel is also Jesus Christ. 1 COR 10:4. And all drank the same spiritual drink. For they drank from the same spiritual rock that followed them and the rock was CHRIST.
Other related scriptures are to be found also in what is generally called HIS SHEKINAH GLORY Lk. 2:9 And lo, the Angel of The Lord came on them and the glory shone around them. And they were grievously afraid. Mt. 17:5 While he yet spoke, behold a bright cloud overshadowed them. And behold a voice out of the cloud which said, this is my son, in whom I am well pleased, hear him.