Dua to be read after obligatory (fard) prayers

• Recite Astaghfirullah thrice.
• It is Sunnah to recite this dua.

Then recite:

Allâhuma antas salãm wa minkas salâm tabãrakta yâ dhal jalâli wal ikrãm.

O Allah (SWT), You are The Giver of Peace and peace comes from You alone. You are blessed, O You Majestic and benevolent. (Muslim)

• Then recite the following dua:

La ilãha illallâhu wahdahu Ia sharika lahü lahul mulku walahul hamdu wa huwa alâ kulli shay’in qadir. Allâhumma lâ mãni’a limâ a’tayta walâ mu’tiya limâ mana’ta, walâ yanfa-’ dhal jaddi minkal-jaddu.

There is no deity except Allah (SWT), He is One, He has no partner. For Him is the Sovereignty and for Him is all praise. He has power over all things. O Allah (SWT), no one can deny that which You bestow and no one can bestow that which You deny and the wealth of the wealthy cannot help them from You (i.e. Your wrath and punishment). (Bukhari)

• Rasul-ullah (Sallaho Alaihe Wassallam) Said, “who-so-ever reads these after every Fardh Salah will NOT be deprived, Subhanullah (33 times), Alhum do lillah (33 times) and Allahu Akbar (34 times). (Muslim)

Rasul-ullah (Sallaho Alaihe Wassallam) Said, “who-so-ever reads Ayatul-Kursi after every Fardh Salah then only his death is stopping him from entering into Jannah (paradise). (Nisai).    Please also see the section on Protection.