قَالَ مَالِك فِي الَّذِي يُصَلِّي لِنَفْسِهِ فَنَسِيَ تَكْبِيرَةَ الْافْتِتَاحِ : إِنَّهُ يَسْتَأْنِفُ صَلَاتَهُ .
Imam Malik, may Allah have mercy on him, said that if a person prays alone and forgets the Takbir al-Tahrimah, then he should perform the prayer again from the beginning.