"Messenger of Allah went out to As-Safa and said.We will start with that with which Allah started. Then he recited: 'Verifly, as-Safa and Al-Marwah (two Mountains in Makkah) are of the symbols of Allah.'" (Sahih) Chpater 169. Where To Stand On As-Safa (Using translation from Nasāʾī 2970)  

خَرَجَ رَسُولُ اللهِ ﷺ إِلَى الصَّفَا وَقَالَ نَبْدَأُ بِمَا بَدَأَ اللهُ بِهِ ثُمَّ قَرَأَ {إِنَّ الصَّفَا وَالْمَرْوَةَ مِنْ شَعَائِرِ اللهِ} [البقرة 158]  

"When he went tout the Masjid heading for As-Safa, I heard the Messenger of Allah say: We will start with that with which Allah started.'" (Using translation from Nasāʾī 2969)  

سَمِعْتُ رَسُولَ اللهِ ﷺ حِينَ خَرَجَ مِنَ الْمَسْجِدِ وَهُوَ يُرِيدُ الصَّفَا وَهُوَ يَقُولُ «نَبْدَأُ بِمَا بَدَأَ اللهُ بِهِ»