صحيح ابن خزيمه
Sahih Ibn Khuzaymah
كتاب: الصلاةBook of Prayer
(25) بَابُ اسْتِحْبَابِ تَأْخِيرِ صَلَاةِ الْعِشَاءِ إِذَا لَمْ يَخَفِ الْمَرْءُ الرُّقَادَ قَبْلَهَا،Chapter 25: Recommendation to delay Isha prayer if one does not fear sleeping before it
Hadith Q342
وَلَمْ يَخَفِ الْإِمَامُ ضَعْفَ الضَّعِيفِ وَسَقَمَ السَّقِيمِ فَتَفُوتُهُمُ الْجَمَاعَةُ لِتَأْخِيرِ الْإِمَامِ الصَّلَاةَ، أَوْ يَشُقُّ عَلَيْهِمْ حُضُورُ الْجَمَاعَةِ إِذَا أَخَّرَ صَلَاةَ الْعِشَاءِ.
Also, if there is no fear of weakness for a weak person or illness for a sick person in the case of the Imam delaying the Isha prayer, such that their congregational prayer would be missed or delaying the prayer would make it difficult for them to attend the congregation, then it is recommended to delay the Isha prayer.
