Musnad Ahmad 9074

"Indeed, a woman from the wives of the people of Paradise, the whiteness of her shin is visible through seventy garments until her marrow is seen, and that is because Allah, he Exalted, says: As if they are corundum and Marjan. So, as for the corundum, it is a stone that if you were to enter a wire…

"‏ إِنَّ الْمَرْأَةَ مِنْ نِسَاءِ أَهْلِ الْجَنَّةِ لَيُرَى بَيَاضُ سَاقِهَا مِنْ وَرَاءِ سَبْعِينَ حُلَّةً حَتَّى يُرَى مُخُّهَا وَذَلِكَ بِأَنَّ اللَّهَ يَقُولُ‏:‏ ‏‏(‏كَأََنَّهُنَّ الْيَاقُوتُ وَالْمَرْجَانُ ‏)‏…

Narrated by Abdullah ibn Mas‘ūd + 1 other version