Why did God change the names of Abram and Sarai to Abraham and Sarah #bibleinsights

Someone asked me why did God change the name of Sarai and Abraham to Abraham and Sarah? There's an ancient and beautiful tradition said that Abraham knew how to read in stars and to know the future. He learned from his family how and read in stars that Abraham and Sarai not going to have kids. So when God told him you're going to have kids both of them thought it's going to be from a different woman. But God teach Abraham and Sarai a beautiful thing. God is above the sky is much higher than everything. So you just add the letter hey to their names. The letter H represents the name of God. And suddenly when they read in the star, they see that Abraham and Sarah going to have kids. And this is such a beautiful message to all of us. Let God into your life. Trust him. Every small thing that you think about yourself can be changed by him. Just open the door for him. God bless you.