"while going to Cumorah"

Oliver Cowdery described Joseph's first visit to the Hill Cumorah after Moroni showed him the location.

https://www.josephsmithpapers.org/paper-summary/history-1834-1836/102

You see the great wisdom in God in leading him thus far, that his mind might begin to be more matured, and thereby be able to judge correctly, the spirits. 

I do not say that he would not have obtained the record had he went according to the direction of the angel—I say that he would; but God knowing all things from the beginning, began thus to instruct his servant. 

And in this it is plainly to be seen that the adversary of truth is not sufficient to overthrow the work of God. 

You will remember that I said, two invisible powers were operating upon the mind of our brother while going to Cumorah. 

In this, then, I discover wisdom in the dealings of the Lord: it was impossible for any man to translate the book of Mormon by the gift of God, and endure the afflictions, and [p. 98] temptations, and devices of satan, without being overthrown unless he had been previously benefited with a certain round of experience: 

and had our brother obtained the record the first time, not knowing how to detect the works of darkness, he might have been deprived of the blessings of sending forth the word of truth to this generation. 

Therefore, God knowing that satan would thus lead his mind astray, began at that early hour, that when the full time should arive, he might have a servant prepared to fulfill his purpose. 

So, however afflicting to his feelings this repuls[e] might have been, he had reason to rejoice before the Lord and be thankful for the favors and mercies shown; that whatever other instruction was necessary to the accomplishing this great work, he had learned, by experience, how to discern betwen the spirit of Christ and the spirit of the devil.