What Lucy found on the number 9...

Significance of number 9 in the bible : ( I boldened the part I think could relate to MacBeth. )

The number 9 is used 49 times in the Bible and pictures finality or divine completeness from the Lord.
Jesus died at the 9th hour, the completion of His physical life. His death was the beginning of the finishing of sin and Satan.
As 8 symbolizes circumcision of the heart and the receiving of the Holy Spirit, 9 signifies the fruit of the Spirit. There are 9 fruits of the Spirit found in Galatians 5:22-23:

1. Love
2. Joy
3. Peace
4. Longsuffering
5. Kindness
6. Goodness
7. Faithfulness
8. Gentleness
9. Self-control
The number nine is a most remarkable number in many respects. It is held in great reverence by all who study the occult sciences; and in mathematical science it possesses properties and powers which are found in no other number.*
* Among others may be mentioned (1) that the sum of the digits which form its multiples are themselves always a multiple of nine; e.g., 2 x 9 = 18 (and 1+8=9); 3 x 9 = 27 (and 2+7=9); 4 x 9 = 36 (and 3+6=9); 5 x 9 = 45 (and 4+5=9), etc., etc.; and so with the larger numbers: 52843 x 9 = 475587 (and 4+7+5+5+8+7=36, and 3+6=9). (2) The sum of its multiples through the nine digits = 405, or 9 times 45.
It is the last of the digits, and thus marks the end; and is significant of the conclusion of a matter.
It is akin to the number six, six being the sum of its factors (3x3=9, and 3+3=6), and is thus significant of the end of man, and the summation of all man's works. Nine is, therefore, the number of finality or judgement.


What are the 9 gifts of the Holy Spirit?
The gifts of the spirit in 1Corinthians 12:8-10 are also nine in number:

1. The word of wisdom
2. The word of knowledge
3. Faith
4. Healing
5. The working of miracles
6. Prophecy
7. Discerning of spirits
8. Divers kinds of tongues
9. The interpretation of tongues