1 Nephi 8:29-30
29 And now I, Nephi, do not speak all the words of my father.
30 But, to be short in writing, behold, he saw other multitudes pressing forward; and they came and caught hold of the end of the rod of iron; and they did press their way forward, continually holding fast to the rod of iron, until they came forth and fell down and partook of the fruit of the tree.
We know only one way to interpret what is meant by that, and it would have been very familiar to Lehi and Nephi. It is, as described in the 95th Psalm:
1 O come, let us sing unto the Lord: let us make a joyful noise to the rock of our salvation.
2 Let us come before his presence with thanksgiving, and make a joyful noise unto him with psalms.
3 For the Lord is a great God, and a great King above all gods.
4 In his hand are the deep places of the earth: the strength of the hills is his also.
5 The sea is his, and he made it: and his hands formed the dry land.
6 O come, let us worship and bow down: let us kneel before the Lord our maker.
7 For he is our God; and we are the people of his pasture, and the sheep of his hand (Psalm 95:1-7).