مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 396
Purification
How to Perform Ablution - Section 1
وَعَنْ عَبْدِ اللَّهِ بْنِ زَيْدٍ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ تَوَضَّأَ مَرَّتَيْنِ مَرَّتَيْنِ. رَوَاهُ البُخَارِيّ
‘Abdallah b. Zaid said that the Prophet (ﷺ) performed each detail of his ablution twice. Bukhari transmitted it.
Mishkat al-Masabih, 396صَحِيح (الألباني)