Recite Surah al-Ikhlas (112) after every obligatory prayer. — After Prayer Adhkar
قُلْ هُوَ اللَّهُ أَحَدٌ اللَّهُ الصَّمَدُ لَمْ يَلِدْ وَلَمْ يُولَدْ وَلَمْ يَكُنْ لَهُ كُفُوًا أَحَدٌ
Transliteration: Qul huwallaahu ahad...
Translation: Recite Surah al-Ikhlas (112) after every obligatory prayer.
Reference: Abu Dawud, An-Nasa'i