It was narrated that Sa’eed bin Khalid bin Abu Tuwail said:
I heard Anas bin Malik saying: I heard the Messenger of Allah ﷺ say: “Standing guard one night in the cause of Allah is better than a man fasting and praying, among his family, for a thousand years. The year is three hundred and sixty days and a day is like a thousand years.”

حَدَّثَنَا عِيسَى بْنُ يُونُسَ الرَّمْلِيُّ، حَدَّثَنَا مُحَمَّدُ بْنُ شُعَيْبِ بْنِ شَابُورَ، عَنْ سَعِيدِ بْنِ خَالِدِ بْنِ أَبِي الطَّوِيلِ، قَالَ سَمِعْتُ أَنَسَ بْنَ مَالِكٍ، يَقُولُ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ " حَرْسُ لَيْلَةٍ فِي سَبِيلِ اللَّهِ أَفْضَلُ مِنْ صِيَامِ رَجُلٍ وَقِيَامِهِ فِي أَهْلِهِ أَلْفَ سَنَةٍ السَّنَةُ ثَلاَثُمِائَةٍ وَسِتُّونَ يَوْمًا وَالْيَوْمُ كَأَلْفِ سَنَةٍ " .