كتاب الجهاد
11  
Jihad
Bulugh al-Maram 1275
Ahmad and Abu Dawud transmitted a similar hadith on the authority of Abu Sa’id, and they added the extra statement, “Go back and ask for their permission. If they permit you to go, then go for Jihad otherwise, be good to them (look after them).
وَلِأَحْمَدَ, وَأَبِي دَاوُدَ: مِنْ حَدِيثِ أَبِي سَعِيدٍ نَحْوُهُ, وَزَادَ: { "اِرْجِعْ فَاسْتَأْذِنْهُمَا, فَإِنْ أَذِنَا لَكَ; وَإِلَّا فَبِرَّهُمَا" } 1‏ .‏
Reference : Bulugh al-Maram 1275
In-book reference : Book 11, Hadith 1275
English translation : Book 11, Hadith 1302
Hadith Text
Reference