صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب الأذان والإقامةChapters on Adhan and Iqamah
(49) بَابُ الْأَمْرِ بِالْأَذَانِ وَالْإِقَامَةِ فِي السَّفَرِ، وَإِنْ كَانَا اثْنَيْنِ لَا أَكْثَرَChapter 49: Command to call the adhan and iqamah while traveling, even if only two people
Hadith Q395
بِذِكْرِ خَبَرٍ لَفْظُهُ عَامٌّ مُرَادُهُ خَاصٌّ
The narration in this regard whose wording is general but its meaning is specific.
