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.
Arcana Coelestia # 7383
7383. 'Over the rivers, over the streams, and over the pools' means against falsities. This is clear from the meaning of Egypt's 'rivers' and 'streams' as teachings that consist of falsity, dealt with in 7323; and from the meaning of 'pools' as factual knowledge that is subservient to those teachings, dealt with in 7324. Accordingly, falsities are what are meant by 'rivers, streams, and pools'.