When the Bible refers to where someone or something came from, it's internally talking about their spiritual origins, or the spiritual states that led them to their current state.

Time and space are physical realities which don't exist in the same way on a spiritual plane. Instead, people in the spiritual world experience differences in spiritual state. Someone in a different spiritual state appears distant, while someone in a similar spiritual state appears close. We get some glimpses of this; we can feel "close" to someone we love even if we are halfway around the world, based on the affection we have for them (affection being a spiritual state, even in this life).

(Odkazy: Apocalypse Explained 105, 472; Apocalypse Revealed 376; Arcana Coelestia 278, 3031, 3776)

376. Then one of the elders answered, saying to me, "Who are these arrayed in white robes, and where did they come from?" And I said to him, "Lord, you know." (7:13-14)

This symbolizes their desire to know and wish to inquire, and the reply and instruction given.

John was asked these questions because it is common in all Divine worship for a person to first wish, desire, and pray, and for the Lord then to reply, instruct, and effect. A person does not otherwise accept anything Divine.

Now because John saw those who were arrayed in white robes, and desired to know and ask who they were, and because this was perceived in heaven, therefore he was first asked about them, and afterward informed.

The case was similar with the prophet Zechariah when he saw the many representations displayed before him, as can be seen from Zechariah 1:9, 19, 21; 4:2, 5, 11-12; 5:2, 6, 10; 6:4.

Moreover in the Word we frequently read that the Lord answers when people call on Him or cry out to Him (as in Psalms 4:1; 17:6; 20:9; 34:4; 91:15; 120:1), and that He gives to people when they ask (Matthew 7:7-8; 21:22). Yet, even so, it is the Lord who gives people to ask and what they should ask for, and the Lord knows it, therefore, beforehand. But still it is the Lord's will that a person first ask, in order that the person may do so as though on his own, and that the petition may thus be assigned to him. Otherwise, if the petition itself did not emanate from the Lord, it would not have been said in those passages that people would receive whatever they ask.