Hadith 1

Sahih Bukhari

Book 10: Call to Prayers (Adhaan)

Chapter 1

How the Adhan for Salat (Prayer) was started

باب بَدْءُ الأَذَانِ

And the Statement of Allah جل جلاله: "And when you proclaim the call for As-Salat [call for the prayer (Adhan)], they take it (but) as a mockery and fun; that is because they are a people who understand not." (V.5:58). And also the Statement of Allah تعالى: "...When the call (Adhan) is proclaimed for the Salat (prayer) on the day of Friday..." (V.62:9).
وَقَوْلُهُ عَزَّ وَجَلَّ: {وَإِذَا نَادَيْتُمْ إِلَى الصَّلاَةِ اتَّخَذُوهَا هُزُوًا وَلَعِبًا ذَلِكَ بِأَنَّهُمْ قَوْمٌ لاَ يَعْقِلُونَ} وَقَوْلُهُ: {إِذَا نُودِيَ لِلصَّلاَةِ مِنْ يَوْمِ الْجُمُعَةِ}.
Sahih al-Bukhari 603
حَدَّثَنَا عِمْرَانُ بْنُ مَيْسَرَةَ، حَدَّثَنَا عَبْدُ الْوَارِثِ، حَدَّثَنَا خَالِدٌ الْحَذَّاءُ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسٍ، قَالَ ذَكَرُوا النَّارَ وَالنَّاقُوسَ، فَذَكَرُوا الْيَهُودَ وَالنَّصَارَى، فَأُمِرَ بِلاَلٌ أَنْ يَشْفَعَ الأَذَانَ وَأَنْ يُوتِرَ الإِقَامَةَ‏.‏
Anas:

The people mentioned the fire and the bell (they suggested those as signals to indicate the starting of prayers), and by that they mentioned the Jews and the Christians. Then Bilal was ordered to pronounce Adhan for the prayer by saying its wordings twice, and for the Iqama (the call for the actual standing for the prayers in rows) by saying its wordings once. (Iqama is pronounced when the people are ready for the prayer).