Ibn ‘Abbas said that God’s Messenger used to begin his prayer with, “In the name of God, the Compassionate, the Merciful.” Tirmidhi transmitted it and said that the <i>isnad</i> of this tradition is not approved.

عَنِ ابْنِ عَبَّاسٍ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَفْتَتِحُ صَلَاتَهُ بِ (بِسم الله الرَّحْمَن الرَّحِيم) رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ لَيْسَ إِسْنَادُهُ بِذَاكَ