Alma's obedience to the angel

In Mosiah 27:16, the angel speaks to Alma:

Now I say unto thee: Go, and remember the captivity of thy fathers in the land of Helam, and in the land of Nephi; and remember how great things he has done for them; for they were in bondage, and he has delivered them.

Notice how Alma is very careful obeying the angel as this becomes a recurring theme in the Book of Alma

Alma 5:

4 And behold, I say unto you, they were delivered out of the hands of the people of king Noah, by the mercy and power of God.

5 And behold, after that, they were brought into bondage by the hands of the Lamanites in the wilderness; yea, I say unto you, they were in captivity, and again the Lord did deliver them out of bondage by the power of his word; and we were brought into this land, and here we began to establish the church of God throughout this land also.

6 And now behold, I say unto you, my brethren, you that belong to this church, have you sufficiently retained in remembrance the captivity of your fathers?

Alma 29:

11 Yea, and I also remember the captivity of my fathers; for I surely do know that the Lord did deliver them out of bondage, and by this did establish his church; yea, the Lord God, the God of Abraham, the God of Isaac, and the God of Jacob, did deliver them out of bondage.

12 Yea, I have always remembered the captivity of my fathers; and that same God who delivered them out of the hands of the Egyptians did deliver them out of bondage.

Alma 36:

2 I would that ye should do as I have done, in remembering the captivity of our fathers; for they were in bondage, and none could deliver them except it was the God of Abraham, and the God of Isaac, and the God of Jacob; and he surely did deliver them in their afflictions.