5107. 'Do not interpretations belong to God?' means that the Divine is within them. This is clear from the meaning of 'the interpretation', when used in reference to dreams, as that which these hold within them, as just above in 5105 - that which is Divine being meant by 'God'.

The number three in the Bible represents completeness. That's why Jesus rose on the third day after the Crucifixion -- his transformation was complete. It's why Elijah stretched himself on the dead child three times, why Jonah was in the belly of the fish for three days, why the Lord called Samuel three times, and many more. It's also reflected in the fact that there are three levels of heaven, three levels of hell, three levels to human life and, ultimately, three aspects of the Lord Himself: Father, Son and Holy Spirit.