Language:
كتاب التهجد
19  
Prayer at Night (Tahajjud)
(31)
Chapter: To offer the Salat-ud-Duha in journey
(31)
باب صَلاَةِ الضُّحَى فِي السَّفَرِ
Sahih al-Bukhari 1175

Narrated Muwarriq:

I asked Ibn `Umar "Do you offer the Duha prayer?" He replied in the negative. I further asked, "Did `Umar use to pray it?" He (Ibn `Umar) replied in the negative. I again asked, "Did Abu Bakr use to pray it?" He replied in the negative. I again asked, "Did the Prophet (ﷺ) use to pray it?" Ibn `Umar replied, "I don't think he did."

حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ شُعْبَةَ، عَنْ تَوْبَةَ، عَنْ مُوَرِّقٍ، قَالَ قُلْتُ لاِبْنِ عُمَرَ ـ رضى الله عنهما ـ أَتُصَلِّي الضُّحَى قَالَ لاَ‏.‏ قُلْتُ فَعُمَرُ‏.‏ قَالَ لاَ‏.‏ قُلْتُ فَأَبُو بَكْرٍ‏.‏ قَالَ لاَ‏.‏ قُلْتُ فَالنَّبِيُّ صلى الله عليه وسلم قَالَ لاَ إِخَالُهُ‏.‏
Reference : Sahih al-Bukhari 1175
In-book reference : Book 19, Hadith 53
USC-MSA web (English) reference : Vol. 2, Book 21, Hadith 271
  (deprecated numbering scheme)