As recorded at Deuteronomy 31:12, 13, God had the command given by his prophet Moses before the chosen nation of ancient days went into the land promised to them: “Congregate the people, the men and the women and the little ones and your alien resident who is within your gates, in order that they may listen and in order that they may learn, as they must fear Jehovah your God and take care to carry out all the words of this law.

Who are involved here? This sweeping command takes in everybody in the land, the entire family plus the alien residents associated with them. So on occasions for worship the families should be together. There was no segregation of the children. All assembled together. Why? What should they do? It was a time to listen. It was a place to learn. If they faithfully did this, they would not forget God’s law, and the children coming along would learn of their relationship to Jehovah.