Reciting the Last Ten Verses of Surah Aal-e-Imraan at the time of Tahajjud

At the time of tahajjud, one should recite the last ten verses of Surah Aal-e-Imraan (i.e. starting from the verse):

إِنَّ فِي خَلْقِ السَّموتِ وَالْأَرْضِ وَاخْتِلَافِ اللَّيْلِ وَالنَّهَارِ لَآيتٍ لِأُولِي الْأَلْبَابِ

عن ابن عباس رضي الله عنهما أنه رقد عند النبى صلى الله عليه وسلم فرآه استيقظ فتسوك وتوضأ وهو يقول إن فى خلق السموات والأرض حتى ختم السورة  (ابو داود رقم 1355)

Hadhrat ibn Abbaas (Radhiallahu Anhuma) reports that on one occasion he spent the night by Rasulullah (Sallallahu Alaihi Wasallam). He saw that when he woke up at night (to perform tahajjud), he would use the miswaak and perform wudhu, and he would recite the following Aayat (of Surah Aal-e-Imraan) till the end of the surah:

إِنَّ فِي خَلْقِ السَّموتِ وَالْأَرْضِ وَاخْتِلَافِ اللَّيْلِ وَالنَّهَارِ لَآيتٍ لِأُولِي الْأَلْبَابِ