In the book of Ether, we read this account:
And it came to pass at the end of four years that the Lord came again unto the brother of Jared and stood in a cloud and talked with him. And for the space of three hours did the Lord talk with the brother of Jared, and chastened him because he remembered not to call upon the name of the Lord. (Ether 2:14)
According to Bruce Dana, one could infer from this verse that the Lord chastened him for three hours for not praying. However, it seems that the brother of Jared never stopped praying to the Lord; he committed a sin of omission by not praying "for [or performing something for or with] his brethren who were with him." This is borne out in the subsequent verse: "And the brother of Jared repented of the evil which he had done, and did call upon the name of the Lord for his brethren who were with him. (Ether 2:15) Moreover, the Lord said unto him: "I will forgive thee and thy brethren of their sins."
Dana believes that, for three hours, the Lord was giving instructions on how to build the barges for the long journey upon the water. In support of this belief, verse 16 reads: "And the Lord said: Go to work and build, after the manner of barges which ye have hitherto built. And it came to pass that the brother of Jared did go to work, and also his brethren." [Bruce E. Dana, Mysteries of the Kingdom, pp. 49-51]