Abdullah bin Alqamah bin Waqas narrates: When the muezzin of Muawiyah (may Allah be pleased with him) gave the call to prayer, I was present with him. Muawiyah (may Allah be pleased with him) repeated what his muezzin said (i.e., he responded to the call), until when the muezzin said: "Hayya 'ala as-salah," he (Muawiyah) said: "La hawla wa la quwwata illa billah," and when he said: "Hayya 'ala al-falah," he (Muawiyah) said: "La hawla wa la quwwata illa billah." Then after that, he repeated the same words as the muezzin had said, then said: "I heard the Messenger of Allah (ﷺ) used to do the same."
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 171
Hadith Takhrijأخرجه البخارى: الجمعة، باب يجيب الامام على المنبر اذا سمع النداء: 94 ، 612.