Congratulating new parents

بَارَکَ اللہُ لَکَ فِيْ الْمَوْھُوْبِ لَکَ وَشَکَرْتَ الْوَاھِبَ وَبَلَغَ أَشُدَّہٗ وَرُزِقْتَ بِرَّہٗ

May Allah bless you with His gift to you, and may you (the new parent) give thanks, may the child reach the maturity of years, and may you be granted its righteousness.