The Hebrew word for Love, ahava, has a
numerological value of 13. Similarly, the
Hebrew word for unity or the number one, echod, also has a numerological value of 13. Together, they total 26, the same as the numerological value of the
Tetragrammaton, the four-lettered name of the Divine, formed by the letters
yud heh vahv heh. Thus, God is seen as having the qualities of unity and love.
SOURCE: Donald Michael Kraig