كتاب الصلاة
4  
The Book of Prayers
(13)
Chapter: The Proof Of Those Who Say That The Basmalah Should Not Be Recited Aloud
(13)
باب حُجَّةِ مَنْ قَالَ لاَ يَجْهَرُ بِالْبَسْمَلَةِ ‏
Sahih Muslim 399 d

It is reported on the authority of Abu Talha that he had heard Anas b. Malik narrating this.

Reference : Sahih Muslim 399d
In-book reference : Book 4, Hadith 55
USC-MSA web (English) reference : Book 4, Hadith 789
  (deprecated numbering scheme)