´It was narrated that 'Abdullah said:` "The Messenger of Allah said to me: 'The sign that you have been permitted to come in is that you raise the curtain and that you hear me speaking quietly, until I forbid you.' (i.e. unless I forbid you)."
Hadith Referenceسنن ابن ماجه / باب فى فضائل اصحاب رسول الله صلى الله عليه وسلم / 139
´It was narrated that ‘Aishah said:` “The Prophet (ﷺ) used to strive hard (in worship) in the last ten nights of Ramadan as he never did at any other time.”
Hadith Referenceسنن ابن ماجه / كتاب الصيام / 1767
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم