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.
tabarani:12781al-Ḥusayn b. Isḥāq al-Tustarī > Abū al-Rabīʿ al-Zahrānī > Sallām al-Ṭawīl > Zayd al-ʿAmmī > Abū Naḍrah > Ibn ʿAbbās

[Machine] The Prophet of Allah ﷺ used to say, "When he bowed down in prayer, he would remain still so that even if water was poured on his back, it would stay there."  

الطبراني:١٢٧٨١حَدَّثَنَا الْحُسَيْنُ بْنُ إِسْحَاقَ التُّسْتَرِيُّ ثنا أَبُو الرَّبِيعِ الزَّهْرَانِيُّ ثنا سَلَّامٌ الطَّوِيلُ عَنْ زَيْدٍ الْعَمِّيِّ عَنْ أَبِي نَضْرَةَ عَنِ ابْنِ عَبَّاسٍ قَالَ

كَانَ رَسُولُ اللهِ ﷺ «إِذَا رَكَعَ اسْتَوَى فَلَوْ صُبَّ عَلَى ظَهْرِهِ الْمَاءُ لَاسْتَقَرَّ»