صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب الأذان والإقامةChapters on Adhan and Iqamah
(35) بَابُ الْأَمْرِ بِالْأَذَانِ لِلصَّلَاةِ قَائِمًا لَا قَاعِدًا،Chapter 35: Command to call the adhan standing, not sitting
Hadith Q364
إِذِ الْأَذَانُ قَائِمًا أَحْرَى أَنْ يَسْمَعَهُ مَنْ بَعُدَ عَنِ الْمُؤَذِّنِ مِنْ أَنْ يُؤَذِّنَ وَهُوَ قَاعِدٌ.
Because by giving the adhan while standing, even a person far from the mu’adhdhin can hear the adhan well, whereas this benefit cannot be achieved by giving the adhan while sitting.
