مُوَطَّأُ مَالِكٍ
Muwatta Malik 704
I'tikaf in Ramadan
وَحَدَّثَنِي زِيَادٌ، عَنْ مَالِكٍ، عَنْ حُمَيْدٍ الطَّوِيلِ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّهُ قَالَ خَرَجَ عَلَيْنَا رَسُولُ اللَّهِ صلى الله عليه وسلم فِي رَمَضَانَ فَقَالَ إِنِّي أُرِيتُ هَذِهِ اللَّيْلَةَ فِي رَمَضَانَ حَتَّى تَلاَحَى رَجُلاَنِ فَرُفِعَتْ فَالْتَمِسُوهَا فِي التَّاسِعَةِ وَالسَّابِعَةِ وَالْخَامِسَةِ .
Ziyad related to me from Malik from Humayd at-Tawil that 'Anas ibn Malik said, "The Messenger of Allah, (ﷺ), came out to us in Ramadan and said, 'I was shown a certain night in Ramadan and then two men abused each other and it was taken away. Look for it on the ninth and the seventh and the fifth.' "
Arabic/English book reference: Book 19, Hadith 14