Again - It should be, “and David again gathered,” etc., i. e. after the previous gathering, either for his election to the kingdom 2 Samuel 5:1-3 or for the Philistine war 2 Samuel 5:17-25, he assembled them again for the peaceful purpose of bringing up the ark to Mount Zion (see marginal reference). The whole narrative indicates the progressive consolidation of David’s power, and the settlement of his monarchy on strong foundations.
Related Commentaries of 2 Samuel 6:1
2 Samuel 6:1
1 Again, David gathered together all the chosen men of Israel, thirty thousand.