Seven, as in Revelation 15:1, signifies everything in an universal sense. The number 'seven' was considered holy, as is well known, because of the six days of creation, and the seventh, which is the celestial self, where peace, rest, and the Sabbath is. The number seven occurs so frequently in the rites of the Jewish church and is held holy everywhere.

So times were divided into seven, longer and shorter intervals, and were called weeks, like the great intervals of times till the coming of the Messiah, in Daniel 9:24-25. The time of seven years is called 'a week' by Laban and Jacob, as in Genesis 29:27-28. So wherever the number seven occurs, it is considered holy and sacred, as in Psalm 119:164, and in Isaiah 30:26.

As the periods of a person's regeneration are distinguished into six, prior to the seventh, or the celestial self, so the times of vastation are also distinguished, until nothing celestial is left. This was represented by the many captivities of the Jews, and by the last Babylonian captivity, which lasted seven decades, or seventy years. This was also represented by Nebuchadnezzar, in Daniel 4:16, 22, 29. It also refers to the vastation of the end times, in Revelation 15:1, 7-8. They should 'tread the holy city under foot, forty and two months, or six times seven,' as in Revelation 11:2 and Revelation 5:1. So the severity and increments of punishment were expressed by the number seven, as in Leviticus 26:18, 21, 24, 28 and Psalm 79:12.

(参考: Apocalypse Explained 5, 7-8, 15; Arcana Coelestia 395; Daniel 9, 9:24, 9:25; Psalms 119)

3373. 'And to your seed' means truth. This is clear from the meaning of 'seed' as truth, dealt with in 29, 255, 1025, 1447, 1610, 1940, 2848, 3310, and so truth from the Lord's Divine, which is 'your seed'. Those who understand the Word solely according to the sense of the letter can know no more than this, that 'seed' means descendants - here Isaac's descendants through Esau and Jacob, primarily through Jacob since the Word existed among that nation and so many of its historical descriptions have to do with them. But in the internal sense 'seed' is not used to mean any descendants from Isaac but all who are the Lord's 'sons', and so who are 'the sons of His kingdom', or what amounts to the same, those in whom good and truth which come from the Lord are present. And as these constitute 'the seed' it follows that good and truth themselves from the Lord are 'the seed', for these are what make people His 'sons'. This is also the reason why truths themselves which come from the Lord are called 'the sons of the kingdom' in Matthew,

He who sows the good seed is the Son of Man, the field is the world, the seed are the sons of the kingdom. Matthew 13:37-38.

And for this reason also 'sons' generally means truths, 489, 491, 533, 1147, 2623.

[2] Anyone who thinks rather more deeply or inwardly may recognize that the seed of Abraham, Isaac, and Jacob, mentioned so many times, and spoken of so many times as those who were to be blessed, and more so than all nations and peoples in all the world, cannot in the Divine Word mean the descendants of those three. For among all nations they least of all were moved by the good that flows from love to the Lord and from charity towards the neighbour. Nor indeed did any truth of faith exist with them. Who the Lord is, what His kingdom is, and so what heaven is and what the life after death, they did not know at all. They did not know these things because for one thing they did not wish to know and for another because if they had come to know about them they would have denied them completely in their hearts and so would have profaned interior goods and truths, as they did exterior by becoming on so many occasions open idolaters. This is the reason why any interior truths are rarely visible in the literal sense of the Old Testament Word. Because the nature of those people was such, the Lord therefore said about them, quoting Isaiah,

He has blinded their eyes and hardened their heart, lest they see with their eyes and understand with their heart, and are converted and I heal them. John 12:40.

What He said about them when they declared they were 'the seed of Abraham',

They said, We are the seed of Abraham. Our father is Abraham. Jesus said to them, If you were Abraham's sons, you would do the works of Abraham. You are from your father the devil, and the desires of your father you will to do. John 8:33, 39, 44.

Here also 'Abraham' is used to mean the Lord, as in every other instance in the Word. The Lord explicitly states that they were not His seed or sons but came from the devil. From this it is quite evident that 'the seed of Abraham, Isaac, and Jacob' in both the historical part and the prophetical part of the Word is in no way used to mean such descendants, for the Word is Divine in every detail Instead it means all who constitute 'the Lord's seed', that is, those with whom the good and truth of faith in Him are present. The fact that heavenly seed, that is, all good and truth, comes from the Lord alone, see 1438, 1614, 2016, 2803, 2882, 2883, 2891, 2892, 2904, 3195.