Righteous Offspring

أعوذ بالله من الشيطان الرجيم 

Al-Anbiya 21:72

وَوَهَبْنَا لَهُ‌وٓ إِسْحَٰقَ وَيَعْقُوبَ نَافِلَةًۖ وَكُلًّا جَعَلْنَا صَٰلِحِينَ 

And We gave him Isaac and Jacob in addition, and all [of them] We made righteous.

______from Tafsir ibn Katheer____

وَوَهَبْنَا لَهُ إِسْحَقَ وَيَعْقُوبَ نَافِلَةً

And We bestowed upon him Ishaq, and Ya`qub Nafilatan.

Ata' and Mujahid said,

"Nafilatan means as a gift."

Ibn Abbas, Qatadah and Al-Hakam bin `]Uyaynah said,

"The gift of a son who has a son,"

meaning that Yaqub was the son of Ishaq, as Allah says:

فَبَشَّرْنَـهَا بِإِسْحَـقَ وَمِن وَرَاءِ إِسْحَـقَ يَعْقُوبَ

But We gave her glad tidings of Ishaq, and after Ishaq, of Yaqub. (11:71)

Abdur-Rahman bin Zayd bin Aslam said,

"He asked for one (son), and said, 

رَبِّ هَبْ لِى مِنَ الصَّـلِحِينِ

"My Lord! Grant me from the righteous." (37:100) 

So Allah gave him Ishaq, and gave him Yaqub in addition. 

 

وَكُلًّ جَعَلْنَا صَالِحِينَ

 

 

Each one We made righteous.

means, both of them were good and righteous people.