مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 1022
Prayer
Forgetfulness - Section 3
وَعَنْ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ قَالَ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم يَقُول: «مَنْ صَلَّى صَلَاةً يَشُكُّ فِي النُّقْصَانِ فَلْيُصَلِّ حَتَّى يشك فِي الزِّيَادَة» . رَوَاهُ أَحْمد
‘Abd ar-Rahman b. ‘Auf said that he heard God’s Messenger say,“If any of you prays a prayer and is in doubt whether it is deficient, he should go on praying till he begins to wonder whether he has not prayed too much.” Ahmad transmitted it.
Mishkat al-Masabih, 1022حسن (الألباني)