Husain (RA) once taught someone the right words to say for a new baby. He said, Here is what you say:
بَارَكَ اللَّهُ لَكَ فِي الْمَوْهُوبِ لَكَ وَشَكَرْتَ الْوَاهِبَ وَبَلَغَ أَشُدَّهُ وَرُزِقْتَ بِرَّهُ
Transliteration
BaarakAllahu laka fil-mawhoobi laka, wa shakartal-waahiba, wa balagha 'ashuddahu, wa ruziqta birrahu.
Translation
May Allah bless you with His gift to you, and may you (the new parent) give thanks (to Allah - the giver), may the child reach the maturity of years, and may you be granted its righteousness.
Say this dua when a baby arrives. It asks Allah for Barakah on the child and parents. You pray for strong Iman, good health, and a thankful heart for this gift from Allah.
You ask Allah to bless the baby, help them grow with good character, and be loving to their parents. It is a kind prayer for the child's future.
Taḥnīk means softly putting honey or dates in the baby's mouth after birth. A pious person does this in the first few days. It is sunnah and a sweet welcome for the baby.
Masha Allah means whatever Allah wants. Say it when you see something good. It reminds us every blessing is from Allah.
Many people say the Athaan softly in the baby's ear. This way, Allah's name and the Kalimah are the first words the baby hears.
Parents say Allahumma rahmataka arju - O Allah, I ask for Your kindness. This masnoon dua brings comfort during childbirth.
Masnoon Dua When Entering Mosque
Dua to Stay Safe from Bad Eye
Dua to Stay Safe at Night (Masnun Dua)
Say This When You Hear a Rooster Crow or Donkey Bray (Seek Protection from Shaitan)
Dua to Stop Whispers and Bad Thoughts
How to Control Anger - Hadith from Sahih Bukhari