Congratulating on a birth with gratitude to Allah
Nahj al-Balāgha|Volume 1|Book 3|Chapter 354
لَا تَقُلْ ذلِكَ، وَلكِنْ قُلْ: شَكَرْتَ الْوَاهِبَ، وَبُورِكَ لَكَ فِي الْمَوْهُوبِ، وَبَلَغَ أَشُدَّهُ، وَرُزِقْتَ بِرَّهُ.
Do not say so; but say: You have occasion to be grateful to Allāh, the Giver, and be blessed with what you have been given. May he attain full life and may you be blessed with His devotion.