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Muhammad's experiences at Heera have been documented by
various Muslim writers.
For example, Molana Rum relates Muhammad's description of his meditative experiences:
My ears reverberate with the sound of God. But God's sound hides from fleshly ears.
And Molana Sheikh Muhammad Akaram Sabari has written that Muhammad remained immersed in vibrant unceasing inner sound while living in this cave (Iktbas-Ul-Anwar, 106). Sabari also claims that the founder of the Qadari Sufi Community, Hajrat Kadar Jilani, meditated in this same cave for extended
periods of time.
From these examples, it is clear that the Prophet Muhammad practiced the Yoga of Sound in the same way as various saints of different traditions. In Sufism (mystical Islam) the Yoga of Sound is known as Sultanulajakar, and in the Vedic tradition it is known as Nadanusandhana or Surat Shabad Yoga. This practice of the divine sound is considered to be the highest practice of the saints. It is believed that the experience of sound meditation was also attained by Muhammad Dara Shikoh, the eldest son of the Mughal Emperor of India, Shah Jahan Khan. He has written:
The entire world is filled with the divine light and sound of God. The blind still ask where God is.
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