Genesis 25:1 KJV

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

KeturahAs Sarah stands for "the mother of us all," i.e. of those who, by grace, are one with the true Son of promise, of whom Isaac was the type John 3:6–8; Gal...

Abraham's family by Keturah, His death and burialAll the days, even of the best and greatest saints, are not remarkable days; some slide on silently; such were these last days of Abraham. Here is an account...

Genesis 23:1–2 And Sarah was an hundred and seven and twenty years old: these were the years of the life of Sarah. …
Genesis 28:1 And Isaac called Jacob, and blessed him, and charged him, and said unto him, Thou shalt not take a wife of the daughters of Canaan.
1 Chronicles 1:32–33 Now the sons of Keturah, Abraham's concubine: she bare Zimran, and Jokshan, and Medan, and Midian, and Ishbak, and Shuah. And the sons of Jokshan; Sheba, and Dedan. …

From OpenBible.info, most relevant first.

AbrahamFather of a multitude, son of Terah, named (Gen 11:27) before his older brothers Nahor and Haran, because he was the heir of the...
KeturahIncense, the wife of Abraham, whom he married probably after Sarah’s death (Gen 25:1–6), by whom he had six sons, whom he sent away into...

Then again וַיֹּסֶף wayyōsep יָסַף Verb · hiphil sequential imperfect, third person masculine singular · with and
Abraham אַבְרָהָם ʾabrāhām אַבְרָהָם Proper name
took וַיִּקַּח wayyiqqaḥ לָקַח Verb · qal sequential imperfect, third person masculine singular · with and
a wife אִשָּׁה ʾiššâ אִשָּׁה Noun · feminine singular
and her name וּשְׁמָהּ ûšĕmāh שֵׁם Noun · masculine singular construct · with and, suffix: third person feminine singular
Keturah קְטוּרָה qĕṭûrâ קְטוּרָה Proper name

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