Arabic (Original)
حَدَّثَنَا يَحْيَى بْنُ آدَمَ حَدَّثَنَا إِسْرَائِيلُ عَن أَبِي إِسْحَاقَ عَن الْأَسْوَدِ قَالَ قَالَ أَبُو مُوسَى لَقَدْ ذَكَّرَنَا عَلِيُّ بْنُ أَبِي طَالِبٍ رَضِيَ اللَّهُ تَعَالَى عَنْهُ صَلَاةً كُنَّا نُصَلِّيهَا مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِمَّا نَسِينَاهَا وَإِمَّا تَرَكْنَاهَا عَمْدًا يُكَبِّرُ كُلَّمَا رَكَعَ وَكُلَّمَا رَفَعَ وَكُلَّمَا سَجَدَ.
English Translation
Yahya ibn Adam told us: Isra'il told us, from Abu Ishaq, from al-Aswad, who said: Abu Musa said, "Ali ibn Abi Talib, may Allah be pleased with him, reminded us of a prayer we used to pray with the Messenger of Allah, peace and blessings be upon him - either we had forgotten it or we had abandoned it deliberately - he would say 'Allahu Akbar' every time he bowed, every time he rose, and every time he prostrated."