Mosiah 2:1

And it came to pass that after Mosiah had done as his father had commanded him, and had made a proclamation throughout all the land, that the people gathered themselves together throughout all the land, that they might go up to the temple to hear the words which king Benjamin should speak unto them.

After Mosiah did what his father told him to do, he made an announcement throughout all the land. The people gathered together from everywhere so they could go to the temple. They wanted to hear the words that King Benjamin would speak to them.

After Mosiah had done what his father commanded and sent word throughout the land, people from everywhere gathered to go up to the temple and hear what King Benjamin had to say.