Sayyiduna Abd Khayr (may Allah have mercy on him) relates: I heard Sayyiduna Ali (may Allah be pleased with him) recite "Glorify the name of your Lord, the Most High" [Surah al-A'la: 1], and after reciting it he said: 'Subhana rabbiya al-a'la' (Glory be to my Lord, the Most High).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3694