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.
muslim:906bSaʿīd b. Yaḥyá al-Umawī from my father > Ibn Jurayj Bihadhā al-Isnād

" It was for a long duration that he (the Holy Prophet) observed qiyam and he would then observe ruku'. (The narrator also added) I (Asma') looked at a woman who was older than I, and at another who was weaker than I.  

مسلم:٩٠٦bوَحَدَّثَنِي سَعِيدُ بْنُ يَحْيَى الأُمَوِيُّ حَدَّثَنِي أَبِي حَدَّثَنَا ابْنُ جُرَيْجٍ بِهَذَا الإِسْنَادِ مِثْلَهُ

وَقَالَ قِيَامًا طَوِيلاً يَقُومُ ثُمَّ يَرْكَعُ وَزَادَ فَجَعَلْتُ أَنْظُرُ إِلَى الْمَرْأَةِ أَسَنَّ مِنِّي وَإِلَى الأُخْرَى هِيَ أَسْقَمُ مِنِّي