Abu Dawud said: These are the words of al-Qa'nabi, and are complete. Malik said: I take it as permissible at the time when the iqamah for prayer is pronounced.
In-book : Book 2, Hadith 325
English translation : Book 2, Hadith 714
2. Prayer (Kitab Al-Salat)
باب مَنْ قَالَ الْحِمَارُ لاَ يَقْطَعُ الصَّلاَةَ