وَعَنْ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ
قَالَ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُول: «مَنْ صَلَّى صَلَاةً يَشُكُّ فِي النُّقْصَانِ فَلْيُصَلِّ حَتَّى يشك فِي الزِّيَادَة»
Abd ar-Rahman ibn 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.