Sahih Muslim 1346
Sahih Muslim · Book 15: The Book of Pilgrimage · It is recommended to stop in Batha' of Dhul-Hulaifah and pray there when departing from Hajj and 'Umrah, or any time one passes through it
Salim b. Abdullah b. Umar reported on the authority of his father (Allah be pleased with them) that Allah's Apostle (ﷺ) came to Dhu'l- Hulaifa in the heart of the valley at the fag end of the night, and it was said to him:
وَحَدَّثَنَا مُحَمَّدُ بْنُ بَكَّارِ بْنِ الرَّيَّانِ ، وَسُرَيْجُ بْنُ يُونُسَ ، - وَاللَّفْظُ لِسُرَيْجٍ - قَالاَ حَدَّثَنَا إِسْمَاعِيلُ بْنُ جَعْفَرٍ ، أَخْبَرَنِي مُوسَى بْنُ عُقْبَةَ ، عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ بْنِ عُمَرَ ، عَنْ أَبِيهِ ، أَنَّ النَّبِيَّ صلى الله عليه وسلم أُتِيَ وَهُوَ فِي مُعَرَّسِهِ مِنْ ذِي الْحُلَيْفَةِ فِي بَطْنِ الْوَادِي فَقِيلَ إِنَّكَ بِبَطْحَاءَ مُبَارَكَةٍ . قَالَ مُوسَى وَقَدْ أَنَاخَ بِنَا سَالِمٌ بِالْمُنَاخِ مِنَ الْمَسْجِدِ الَّذِي كَانَ عَبْدُ اللَّهِ يُنِيخُ بِهِ يَتَحَرَّى مُعَرَّسَ رَسُولِ اللَّهِ صلى الله عليه وسلم وَهُوَ أَسْفَلُ مِنَ الْمَسْجِدِ الَّذِي بِبَطْنِ الْوَادِي بَيْنَهُ وَبَيْنَ الْقِبْلَةِ وَسَطًا مِنْ ذَلِكَ .
It is a blessed stony ground. Musa (one of the narrators) said: Salim made his came) halt at the mosque where 'Abdullah made his camel halt as seeking the place of stay of Allah's Messenger (ﷺ). It is, in fact, situated at a lower plain than the mosque, which stands in the heart of the valley, and it is between it (the mosque) (and Qibla) that that place (where Allah's Apostle used to get down for rest and prayer) is situated.