(16) باب التَّشَهُّدِ فِي الصَّلاَةِ
This hadith has been narrated on the authority of Mansur with the same chain of transmitters and he made a mention of this:
" Then he may choose any supplication which pleases him or which he likes."
Reference: Sahih Muslim 402 c
In-book reference: Book 4, Hadith 61
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 795