Often times in scripture the writer/editor inserts a comment for clarification. After their insertion they resume what they were saying before by repeating its elements. This is called Repetitive Resumption.
In the following example, the Lord speaks about feasts (v. 2) when the editor inserts information about the Sabbath, which was not a feast. (v. 3) After their insertion, they resume talk about feasts by restating what was said before their insertion. (v. 4)
2 [Subject] Speak unto the children of Israel, and say unto them, Concerning the feasts of the Lord, which ye shall proclaim to be holy convocations, even these are my feasts.
3 [Insertion] Six days shall work be done: but the seventh day is the sabbath of rest, an holy convocation; ye shall do no work therein: it is the sabbath of the Lord in all your dwellings.[Insertion Ended]
4 [Resume Subject] These are the feasts of the Lord, even holy convocations, which ye shall proclaim in their seasons. [Elements Repeated] (Leviticus 23:2-4)
The Book of Mormon is replete with Repetitive Resumptions. In the following example, verse 6 is talking about Alma traveling to the city of Ammonihah. Verse 7 is an insertion about how they named their cities. And verse 8 is the repetitive resumption.
6 So that when he had finished his work at Melek he departed thence, and traveled three days’ journey on the north of the land of Melek; and he came to a city which was called Ammonihah.
7 Now it was the custom of the people of Nephi to call their lands, and their cities, and their villages, yea, even all their small villages, after the name of him who first possessed them; and thus it was with the land of Ammonihah.
8 And it came to pass that when Alma had come to the city of Ammonihah he began to preach the word of God unto them. (Alma 8:6-8)