New Living Translation
Being descendants of Abraham doesn’t make them truly Abraham’s children. For the Scriptures say, “Isaac is the son through whom your descendants will be counted,” though Abraham had other children, too.

American Standard Version
neither, because they are Abraham's seed, are they all children: but, In Isaac shall thy seed be called.

Berean Study Bible
Nor because they are Abraham’s descendants are they all his children. On the contrary, “Through Isaac your offspring will be reckoned.”

Douay-Rheims Bible
Neither are all they that are the seed of Abraham, children; but in Isaac shall thy seed be called:

English Revised Version
neither, because they are Abraham's seed, are they all children: but, In Isaac shall thy seed be called.

King James Bible
Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called.

World English Bible
Neither, because they are Abraham's seed, are they all children. But, "In Isaac will your seed be called."

Young's Literal Translation
nor because they are seed of Abraham are all children, but -- 'in Isaac shall a seed be called to thee;'

Romans 9:7 Additional Translations ...