Prophet Muhammad ﷺ had three sons

Hazrat Qasim died at the age of only 3 

Hazrat Abdullah has died at the age of 4

Ibrahim ibn Muh has died at the age of 2 

Additional Information:

Prophet Muhammad ﷺ had three sons and four daughters.

Holy Qur'an, certainly words from Allah (swt) contains four Surah/Chapter which starts with the word 'Inna' and chapters are the following:
 1) Fath a.
2) Nuh.
3) Qad'r.
4) Kausar.

Quran Para 21, contains total of five surahs.

The Battle of Mu'tah was fought in September 629 CE (8 AH), near the village of Mu'tah, east of the Jordan River, between the forces of the Islamic prophet Muhammad and the forces of the Byzantine Empire and their Arab Christian vassals.

• If you have 7.5 tola/3 ounces/87.48 grams of gold or

• 52.5 tota/21 ounces/612.36 grams of silver or

• its cash equivalent for a full lunar year,

• then you are considered Sahib-e-Nisab and should pay Zakat.

Hazrat Saʿd was the seventh person to embrace Islam, which he did at the age of seventeen.
Hazrat Saʿd Born: 595 AD, Mecca, Saudi Arabia
Hazrat Saʿd Died: 674 AD, Al-Baqi', Medina, Saudi Arabia
Hazrat Saʿd Full name: Saʿd ibn Abī Waqqās