Abu Hurairah reported,

The Messenger of Allah ﷺ recited "Say, you disbelievers" and "Say, He is Allah, the One" in the two units of prayer before Fajr.

Azami 13782

Sahih

عن أبي هريرة

أن رسول الله ﷺ قرأ: {قل يا أيها الكافرون} و{قل هو الله أحد} في ركعتي الفجر.

الأعظمي 13782صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Tafsir of the great Quran
Chapter
Tafsir of Surah Kafirun
Section
His saying, "Say, O disbelievers, I do not worship what you worship, nor are you worshippers of what I worship"
Numbering
Jami al-Kamil 13782 (2nd edition)
Azami 13782