Abu Dawud said: The aforesaid tradition has also been narrated by Salih, the client of Tu'mah on the authority if Ibn 'Abbas saying: "Not during rain."
In-book : Book 4, Hadith 17
English translation : Book 4, Hadith 1210
4. Prayer (Kitab Al-Salat): Detailed Rules of Law about the Prayer during Journey
باب الْجَمْعِ بَيْنَ الصَّلاَتَيْنِ