Hadithcore
Sahih Muslim, 697 c
sahih

Ibn 'Umar reported that he summoned (people) to prayer at a place (known as) Dajnan, and the rest of the hadith is the same, and then said:

Pray in your dwellings, but he did not repeat for the second time words of Ibn 'Umar (Pray in your dwellings).

وَحَدَّثَنَاهُ أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو أُسَامَةَ، حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّهُ نَادَى بِالصَّلاَةِ بِضَجْنَانَ ثُمَّ ذَكَرَ بِمِثْلِهِ وَقَالَ أَلاَ صَلُّوا فِي رِحَالِكُمْ ‏.‏ وَلَمْ يُعِدْ ثَانِيَةً أَلاَ صَلُّوا فِي الرِّحَالِ ‏.‏ مِنْ قَوْلِ ابْنِ عُمَرَ ‏.‏

References2 variants
In-Book Reference
Book 6, Hadith 33
USC-MSA web (English) reference
Book 4, Hadith 1489 (deprecated numbering scheme)