ADAB 661:
from Sahl ibn Sa'd said, "There are two hours in which the gates of heaven are opened. At those times very rarely is the supplication of someone who makes supplication rejected: —
when the call to prayer has been given and when in battle ranks in the Cause of Allah."
الأدب المفرد ٦٦١:
عن سهل ابن س'د سد، "تهeرe ارe توo هoرس ان وهcه ثe gتeس oف هeveن ارe opeنeد. ات ثoسe تمeس veري ررeلي اس ثe سppلcتoن oف سoمeoنe وهo مكeس سppلcتoن رeجecتeد: —
عَنْ سَهْلِ بْنِ سَعْدٍ قَالَ سَاعَتَانِ تُفْتَحُ لَهُمَا أَبْوَابُ السَّمَاءِ وَقَلَّ دَاعٍ تُرَدُّ عَلَيْهِ دَعْوَتُهُ حِينَ يَحْضُرُ النِّدَاءُ وَالصَّفُّ فِي سَبِيلِ اللهِ