Mukhtasar Bukhari

Narrated from Sayyiduna Abdullah bin Mughaffal Muzani (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Between every two calls to prayer, there is a prayer." He said this three times (then said): "If anyone wishes to offer it." In another narration, it is stated that the Noble Prophet (peace and blessings of Allah be upon him) said: "Between every two calls to prayer (i.e., the adhan and the iqamah) there is a prayer, between every two calls to prayer (i.e., the adhan and the iqamah) there is a prayer." Then, the third time, he said: "If anyone wishes (he may offer it)."