Regarding Preceding (Ramadan By Fasting At The End Of Sha'ban) Sunan Abi Dawud 2330

Arabic hadith text
حَدَّثَنَا سُلَيْمَانُ بْنُ عَبْدِ الرَّحْمَنِ الدِّمَشْقِيُّ، - فِي هَذَا الْحَدِيثِ - قَالَ قَالَ الْوَلِيدُ سَمِعْتُ أَبَا عَمْرٍو - يَعْنِي الأَوْزَاعِيَّ - يَقُولُ سِرُّهُ أَوَّلُهُ ‏.‏
Translation
Sulaiman b. 'Abd al-Rahman al-Dimashqi said about this tradition that al-Walid said

I heard Abu 'Amr—meaning al-Awza'i—saying: Its sirr is its beginning.