Hadith #5441 (Sunan al-Nasa'i)
Book: The Book of Seeking Refuge with Allah
Narrator(s): al-Mandhar bin Malik bin Qata' المنذر بن مالك بن قطعة - أبو نضرة العبدي, Amr bin 'Ali bin Bahr al-Bahli عمرو بن علي بن بحر الباهلي, Jabir ibn 'Abdullah, Sa'id bin Iyas al-Jariri سعيد بن إياس الجريري, Shadad bin Sa'id شداد بن سعيد أبو طلحة الراسبي

The Messenger of Allah  said to him: “O Ibn ‘Abis, shall I not tell you of the best thing with which those who seek refuge with Allah may do so?” He said: “Yes, O Messenger of Allah.” He said: “Say: I seek refuge with (Allah) the Lord of the daybreak.”, “Say: I seek refuge with (Allah) the Lord of mankind.” – these two Surahs.”

Source: https://parallelquran.com/hadith/sunan-al-nasai-5441/