Bulugh al-Maram 13 Oaths and Vows كتاب الأيمان والنذور 21

وَعَنْ جَابِرٍ – رضى الله عنه – { أَنَّ رَجُلاً قَالَ يَوْمَ اَلْفَتْحِ: يَا رَسُولَ اَللَّهِ! إِنِّي نَذَرْتُ إِنْ فَتَحَ اَللَّهُ عَلَيْكَ مَكَّةَ أَنْ أُصَلِّيَ فِي بَيْتِ اَلْمَقْدِسِ, فَقَالَ: “صَلِّ هَا هُنَا” . فَسَأَلَهُ, فَقَالَ: “صَلِّ هَا هُنَا”. فَسَأَلَهُ, فَقَالَ: “شَأْنُكَ إِذًا” } رَوَاهُ أَحْمَدُ, أَبُو دَاوُدَ, وَصَحَّحَهُ اَلْحَاكِمُ 1 . 1 – صحيح. رواه أحمد ( 3 / 363 )، وأبو داود ( 3305 )، والحاكم ( 4 / 304 – 305 ) بسند على شرط مسلم كما قال الحاكم.

Narrated Jabir (bin ‘Abdullah) (RA): A man said on the day of the Fath, “O Messenger of Allah, I have vowed that if Allah opens the conquest of Makkah at your hands I shall pray in Jerusalem.” He replied, “Pray here.” He asked him again and he replied, “Pray here.” He asked him again and he replied, “It’s up to you, then.” [Reported by Ahmad and Abu Dawud. al-Hakim graded it Sahih (authentic)].