Ibn Sirin narrates: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) slaughtered a camel and became smeared with its blood and dung. Meanwhile the prayer was called (iqamah), and he offered the prayer without performing ablution anew.
Tabarani recorded it in al-Mu'jam al-Kabir, and its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2275