It is narrated from Abu Abd al-Rahman (may Allah have mercy on him) that he used to count the verses in the prayer and also keep count of them by knotting his fingers.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3369
Hadith Gradingمحدثین:ضعيف
Hadith Takhrij«ضعيف۔ ابوعبدالرحمن كا اپنا قول هي۔»