Why did God add the letter ה to Abraham's name, rather than any other letter? This was so that all parts of man's body should be worthy of life in the World to Come, which is likened to the sea. To the extent that we can express it, the Structure was completed in Abraham. It is written (Genesis 9:6), "For in the form of God, He made the man." The gematria of Abraham is 248, the number of parts in man's body.
What is the meaning of (Deuteronomy 33:23), "...he shall inherit it?" It would have been sufficient if the verse said, "inherit" But this comes to teach us that God must also be included. The word יְרָשָׁה (he shall inherit) thus contains the letters “רֵשׁ יָהּ” (inherit God). What does this resemble? A king had two treasuries, and he hid one away. After many days he said to his son, "Take what is in these two treasuries." The son replied, "Perhaps you are not giving me all that you have hidden away." The king said, "Take everything." It is thus written, "the Sea and the South, he shall inherit it." Inherit God (יָהּ רֵשׁ) — everything will be given to you if you only keep My ways.