Genesis 25:1

And Abraham will add and take a wife; and her name Keturah.

Genesis 23:1-2

And the life of Sarah shall be a hundred years, and twenty years, and seven years; the years of the life of Sarah.

Genesis 28:1

And Isaak will call to Jacob, and will bless him, and will command him, and will say to him, Thou shalt not take a wife from the daughters of Canaan.

1 Chronicles 1:32-33

And the sons of Keturah, Abraham's concubine: she brought forth Zimran, and Jokshan, and Medan, and Midian, and Ishbak and Shuah. And the sons of Jokshan; Sheba, and Dedan.

Treasury of Scripture Knowledge

Summary

Then again Abraham took a wife, and her name was Keturah.

Bible References

General references

Genesis 23:1
And the life of Sarah shall be a hundred years, and twenty years, and seven years; the years of the life of Sarah.
Genesis 28:1
And Isaak will call to Jacob, and will bless him, and will command him, and will say to him, Thou shalt not take a wife from the daughters of Canaan.
1 Chronicles 1:32
And the sons of Keturah, Abraham's concubine: she brought forth Zimran, and Jokshan, and Medan, and Midian, and Ishbak and Shuah. And the sons of Jokshan; Sheba, and Dedan.