مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 643
Prayer
The Call to Prayer - Section 2
عَن ابْن عمر قَالَ: كَانَ الْأَذَانُ عَلَى عَهْدِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَرَّتَيْنِ مَرَّتَيْنِ وَالْإِقَامَةُ مَرَّةً مَرَّةً غَيْرَ أَنَّهُ كَانَ يَقُولُ: قَدْ قَامَتِ الصَّلَاةُ قَدْ قَامَتِ الصَّلَاةُ. رَوَاهُ أَبُو دَاوُد وَالنَّسَائِيّ والدارمي
Ibn ‘Umar said that in the time of God's Messenger the phrases in the adhan were uttered twice each and in the iqama once each, except for saying, ‘‘The time for prayer has come. The time for prayer has come.” Abu Dawud, Nasai and Darimi transmitted it.
Mishkat al-Masabih, 643حسن (الألباني)