Riyad as-Salihin #483
The Book of Virtues
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وعن سالم بن عبد الله بن عمر بن الخطاب، رضي الله عنهم، عن أبيه: أن رسول الله صلى الله عليه وسلم ، قال:
"نعم الرجل عبد الله لو كان يصلي من الليل" قال سالم: فكان عبد الله بعد ذلك لا ينام إلا قليلا. ((متفق عليه))
Salim bin 'Abdullah bin 'Umar bin Al-Khattab (May Allah be pleased with them) reported, on the authority of his father, that the Messenger of Allah (ﷺ) said, "What an excellent man 'Abdullah is! If only he could perform optional prayers at night." Salim said that after this, (his father) 'Abdullah slept very little at night..
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About Riyad as-Salihin
This hadith is #483 from Riyad as-Salihin, in the Book of The Book of Virtues.