كتاب الجهاد
11  
The Book of Jihad
(234)
Chapter: Obligation of Jihad
(234)
- باب وجوب الجهاد وفضل الغدوة والروحة
Riyad as-Salihin 1342
Jabir (May Allah be pleased with him) reported:
We accompanied the Prophet (ﷺ) in an expedition when he (ﷺ) said, "Some people have remained behind us in Al-Madinah, and we never cross a valley but they are with us. They share the reward with us because they have been held back by valid excuse."

In another narration the wordings are: "...by any genuine excuse."

In another narration the wordings are: "They are your partners in reward."

[Al- Bukhari].

وعن جابر رضي الله عنه قال‏:‏ كنا مع النبي صلى الله عليه وسلم في غزاة فقال‏:‏ ‏ "‏إن بالمدينة لرجالا ما سرتم مسيرًا، ولا قطعتم واديًا إلا كانوا معكم حبسهم المرض‏"
Reference : Riyad as-Salihin 1342
In-book reference : Book 11, Hadith 58