based on the definitions below, some miracles of the Prophet sallAllahu alayhi wa sallam are classified as karamat.
regardless, in this couplet, karamat is used both as a miracle and as honoured; and the wordplay of
kaan as in ear/treasure trove.
duur o nazdeek kay sun'nay walay woh kaan
kaan e la'al e karamat pay lakhon salaam
those ears (kaan) that could hear from near and from afar
millions of blessings upon the treasure trove of gems of honour [or miracles as diamonds]
in the second line,
kaan = treasure trove [ma'adan], or mine [as in mine of gems].
it is often overlooked, in spite of being obvious: the ear canal resembles a cave - and alahazrat alludes to this as being "honoured gem-mines."
la'al is also used for a ruby - and the Prophet's complexion sallAllahu alayhi wa sallam being intensely fair with a pink hue also indicate that his blessed ears were reddish. and it is commonly observed of people of fair complexion - that their ears have a bright reddish hue.
thus the couplet can be read as:
{
kaan e la'al} e {
karamat} the blessed treasure trove/ mine of gems.
or
{
kaan} e {
la'al e karamat} treasure trove of honoured gems.
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kaan can be read as the 'ear' even in the second line, describing the blessed ears as "honoured gems".
i.e his ears which can hear from near and from afar, those ears, those honoured gems!
kaan la'al e karamat: his ears, like noble and blessed rubies.
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إنِّي أرَى ما لا ترَونَ وأسمعُ ما لا تسمَعون ، أطَّتِ السماءُ وحق لها أن تَئِطَّ ؛ ما فيها موضِعُ أربعِ أصابِعَ إلا ومَلَكٌ واضِعٌ جبهَتَهُ لله ساجدًا
indeed i see what you do not see and hear what you do not hear; i hear the creaking of the heavens, and it deserves to do so because there is not a space of four fingers where the foreheads of the angels are not placed in prostration to Allah ta'ala...
part of the hadith of abu dhar al-ghifari, tirmidhi, #2312; ibn majah, 4190; musnad ahmad #21516.
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apparently, according to modern discoveries - there are sounds in the universe which human ears do not detect. they have converted these signals to audible frequencies, for example:
certainly, the above sounds are not the ones mentioned in the hadith. but what this demonstrates is that there are sounds humans do not hear - but the Prophet sallAllahu alayhi wa sallam was given this miraculous capability to hear sounds from far off and sounds that ordinarily humans cannot detect.
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Allah ta'ala knows best.