Interesting finding in Genesis 21

I found an interesting finding of my reading of the scriptures this evening. In Genesis 21:14-21, you will read about the account of Hagar and Ishmael after they were drivin away by Sarah and Abraham. The interesting part I discovered was later in the chapter in the conversation between Abraham and Abimelech. Read Genesis 21: 22-30 and then when you get to verse 31-33 tie it to verses 14-21 and see if you see what I found. To me it was God knowing what was needed and accomplishing the task through Abraham. Check it out.