Ibn Shubrumah (may Allah have mercy on him) narrated to us that the people began to quarrel over giving the adhan on the battlefield of Qadisiyyah, so they took their dispute to Sayyiduna Sa'd (may Allah be pleased with him), and he cast lots between them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2013