God added the Spirit to Abram and Sarai: making their new spiritual names Abraham and Sarah.
I heard it from a pastor that studies the language and meaning.
"Yahweh -
We will see that God took one "hey" from the middle of His name and placed it in the middle of Abram's name. We also see the same for the "hey" on the end of His name, with which He did the same with Sari, thus making her name Sarah.
Abram +
= Abr
am or Abraham
Sari +
= Sar
or Sarah
Now we see the "Spirit" of God in the mother and in the father of God's people. As the Torah says, "God is your mother and your father."
We see the greater purpose of the name change. It was to "establish" God's covenant which would later be revealed in Yeshua.
"Neither shall thy name any more be called Abram, but thy name shall be Abraham; for a father of many nations have I made thee." (Gen 17:5)"And I will establish my covenant between me and thee and thy seed after thee in their generations for an everlasting covenant, to be a God unto thee, and to thy seed after thee." (Gen 17:7) "