7667. 'Not so!' means a refusal. This is clear without explanation.

7664. 'For it is a feast of Jehovah for us' means worship of the Lord offered by every single one. This is clear from the meaning of 'a feast' as worship with gladness of mind, dealt with in 7093. The reason why it is worship of the Lord is that 'Jehovah' in the Word is the Lord, 1343, 1736, 2921, 3023, 3035, 5663, 6307, 6905, 6945, 6956. The fact that worship by every single one is meant is evident from what comes immediately before, where it says that they would go with children and old men, with sons and daughters, and with flocks and herds.