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:9034ʿAbdullāh b. Muḥammad b. Saʿīd b. Abū Maryam > al-Firyābī > Sufyān > Jūwaybir > al-Ḍaḥḥāk

[Machine] In his statement, "Those who remember Allah while standing, sitting, and lying on their sides," he said, "If you are unable to pray standing, then sitting, and if not, then lying down."  

الطبراني:٩٠٣٤حَدَّثَنَا عَبْدُ اللهِ بْنُ مُحَمَّدِ بْنِ سَعِيدِ بْنِ أَبِي مَرْيَمَ ثنا الْفِرْيَابِيُّ ثنا سُفْيَانُ عَنْ جُوَيْبِرٍ عَنِ الضَّحَّاكِ عَنِ ابْنِ مَسْعُودٍ

فِي قَوْلِهِ {الَّذِينَ يَذْكُرُونَ اللهَ قِيَامًا وَقُعُودًا وَعَلَى جُنُوبِهِمْ} قَالَ «§إِنْ لَمْ تَسْتَطِعْ أَنْ تُصَلِّيَ قَائِمًا فَقَاعِدًا وَإِلَّا فَمُضْطَجِعٌ»