Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
abudawud:903Hannād b. al-Sarī > Wakīʿ > Saʿīd b. Ziyād

Sa'id ibn Ziyad ibn Subayh al-Hanafi said: I prayed by the side of Ibn Umar and I put my hands on my waist. When he finished his prayer, He said: This is a cross in prayer; the Messenger of Allah ﷺ used to forbid it.  

أبو داود:٩٠٣حَدَّثَنَا هَنَّادُ بْنُ السَّرِيِّ عَنْ وَكِيعٍ عَنْ سَعِيدِ بْنِ زِيَادٍ عَنْ زِيَادِ بْنِ صُبَيْحٍ الْحَنَفِيِّ قَالَ صَلَّيْتُ إِلَى جَنْبِ ابْنِ عُمَرَ فَوَضَعْتُ يَدَىَّ عَلَى خَاصِرَتَىَّ فَلَمَّا صَلَّى قَالَ

هَذَا الصَّلْبُ فِي الصَّلاَةِ وَكَانَ رَسُولُ اللَّهِ ﷺ يَنْهَى عَنْهُ  


See similar narrations below:

Collected by Aḥmad
ahmad:5836Wakīʿ > Saʿīd b. Ziyād

Sa'id ibn Ziyad ibn Subayh al-Hanafi said: I prayed by the side of Ibn Umar and I put my hands on my waist. When he finished his prayer, He said: This is a cross in prayer; the Messenger of Allah ﷺ used to forbid it. (Using translation from Abū Dāʾūd 903)  

أحمد:٥٨٣٦حَدَّثَنَا وَكِيعٌ حَدَّثَنَا سَعِيدُ بْنُ زِيَادٍ عَنْ زِيَادِ بْنِ صُبَيْحٍ الْحَنَفِيِّ قَالَ صَلَّيْتُ إِلَى جَنْبِ ابْنِ عُمَرَ فَوَضَعْتُ يَدِي عَلَى خَاصِرَتِي فَضَرَبَ يَدَيَّ فَلَمَّا صَلَّى قَالَ

هَذَا الصَّلْبُ فِي الصَّلَاةِ وَكَانَ رَسُولُ اللهِ ﷺ يَنْهَى عَنْهُ