Three
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.
Ezekiel 31:5-7
5
Therefore its stature was exalted above all the trees of the field; and its boughs were multiplied, and its branches became long by reason of many waters, when it shot [them] forth.
6
All the birds of the sky made their nests in its boughs; and under its branches did all the animals of the field bring forth their young; and under its shadow lived all great nations.
7
Thus was it beautiful in its greatness, in the length of its branches; for its root was by many waters.
