Hafsah (May Allah be pleased with her) reported:
The Messenger of Allah (ﷺ) used to perform two short Rak'ah prayer when it was dawn and the Mu'adhdhin had called Adhan (for the Fajr prayer).[Al-Bukhari and Muslim]. (DE)
App reference (DE): Book 9, Hadith 115 (DE)
Arabic/English book reference (DE): Book 9, Hadith 1105 (DE)