Imam Bukhari narrates: Abdullah bin Yazid narrated to us, he said: Kahmas bin al-Hasan narrated to us from Abdullah bin Buraidah from Abdullah bin Mughaffal, may Allāh be pleased with him, he said that the Prophet ﷺ said:
Between every two Adhans there is a prayer. Then the third time he said: This is for whoever wishes to pray.
Reference: Sahih Al Bukhari 627