A mother's heart

Sheikh Muhammad ibn Faqih narrated this in the Rules of Engagement class:
Promised a man of old
a lad, dinars and gold

For a price like no other
the very heart of his mother

For glitter he did not stagger
took to his mother a long dagger

Pulled out her heart with his hands bare
for everlasting riches, a small fare

Heart in hand, he rushed in haste
not a moment he wished to waste

He fell, and out rolled from his hand
the heart of his mother into the sand

Out called the heart 'O son of mine'
'I hope surely you are fine'

Fear gripped the lad
'What have I done?' he said

His self he intended to punish for the vice
'O my son' called the heart: 'kill me not twice'