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 #872
872. 'The face 1 of the ground' means those things that reside with the member of the Church, and the expression 'the ground' is used because it is the first stage at which man comes to be the Church. This is clear from the meaning of 'the ground', dealt with already, as the member of the Church who is at that point called 'the ground' when the goods and truths of faith can be sown within him. Previously he is called 'the land', as in Genesis 1 where 'the land' refers to man prior to his becoming celestial, while Chapter 2, when he has become celestial, refers to him as 'the ground' and 'the field'. It is similar in the present chapter. The expression 'the land' and the expression 'the ground' are sufficient by themselves to enable someone to recognize what is meant in the internal sense, not only here but also anywhere else in the Word. 'The ground' in the universal sense means the Church, and as the Church is meant so too is the member of the Church for, as stated already, every member of the Church is the Church.
Footnotes:
1. literally, The faces