Best Dua for Children and Spouse

And those who pray, "Our Lord! Grant unto us wives and offspring who will be the comfort of our eyes, and give us (the grace) to lead the righteous." Those are the ones who will be rewarded with the highest place in heaven, because of their patient constancy: therein shall they be met with salutations and peace, Dwelling therein;- how beautiful an abode and place of rest!

[Surat Al-Furqan(25) - Ayahs 74-76]