At that time, Hazrat Abdullah bin Zaid (radhiyallahu ‘anhu) saw a dream. He says: “I saw a man walking past me, dressed in green clothing and holding a naaqoos in his hand (naaqoos refers to two wooden sticks that would be struck together to create a sound like a bell). I asked him, ‘Will you sell this naaqoos to me?’ In reply, he asked me, ‘What will you do with it?’ I responded, ‘I will summon the people to salaah by striking it.’ The man remarked, ‘Should I not show you a method for calling people to salaah which is better and superior to this?’ I replied, ‘Certainly! Why not?’

The man said: ‘Call out the following words to summon the people to salaah:

اَللهُ أَكْبَرْ اللهُ أَكْبَرْ اَللهُ أَكْبَرْ اَللهُ أَكْبَرْ

أَشْهَدُ أَلَّا إِلٰهَ إِلَّا اللهْ أَشْهَدُ أَلَّا إِلٰهَ إِلَّا اللهْ

أَشْهَدُ أَنَّ مُحَمَّدًا رَّسُوْلُ اللهْ أَشْهَدُ أَنَّ مُحَمَّدًا رَّسُوْلُ اللهْ

حَيَّ عَلٰى الصَّلَاةْ حَيَّ عَلٰى الصَّلَاةْ

حَيَّ عَلٰى الْفَلَاحْ حَيَّ عَلٰى الْفَلَاحْ

اَللهُ أَكْبَرْ اللهُ أَكْبَرْ

لَا إِلٰهَ إِلَّا اللهْ

 The man then moved a little to the side and taught me the words of the iqaamah saying, ‘When you stand for salaah, then call out the iqaamah in the same way you call out the azaan, except that after the words Hayya Alal Falaah, you will add the words Qad Qaamatis Salaah twice.’”

(Extracted from Seeratul Mustafa 1/442-443)