The Prophet ﷺ said, "Only one in a state of ablution should call the adhan."
حدثنا علي بن حجر حدثنا الوليد بن مسلم عن معاوية بن يحيى الصدفي عن الزهري
عن النبي ﷺ قال لا يؤذن إلا متوضئ
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Its isnad is daif. Bayhaqi (1/397) also narrated it from the hadith of Walid, with this wording, and he said, "This is how Muawiya bin Yahya narrated it, and he is daif."