What is the authenticity of the Hadith: "When one of you wakes up in the morning, let him say: 'I have woken up praising You, and I bear witness that there is no god but Allah,' three times. And when he reaches the evening, let him say the same"?

The hadith was narrated by An-Nasa'i in "Amal Al-Yawm wa Al-Laylah" (571) and it is in "As-Sunan Al-Kubra" (9/212), on the authority of Abu Hurayrah, that the Prophet (peace and blessings be upon him) said: «When one of you wakes up in the morning, let him say: "I have awoken, praising You with thanks, and I bear witness that there is no god but Allah" three times. And when he reaches the evening, let him say the same.»

This is a sound (hasan) chain of narration because its narrators are trustworthy, with the exception of Mu'awiyah ibn Salih, An-Nasa'i's shaykh, whom Adh-Dhahabi described as "Al-Hafiz" (the memorizer) and Ibn Hajar described as "Sadooq" (truthful). Shaykh Muqbil Al-Wadi'i has deemed it hasan.