Surah Taha, ayah 96

20:96

قَالَ بَصُرۡتُ بِمَا لَمۡ يَبۡصُرُواْ بِهِۦ فَقَبَضۡتُ قَبۡضَةٗ مِّنۡ أَثَرِ ٱلرَّسُولِ فَنَبَذۡتُهَا وَكَذَٰلِكَ سَوَّلَتۡ لِي نَفۡسِي ٩٦

Qāla basurtu bimā lam yabsurū bihī faqabadtu qabdatam min atharir-rasūli fanabadhtuhā wakadhālika sawwalat lī nafsī

He said, "I saw what they did not see, so I took a handful [of dust] from the track of the messenger850 and threw it,851 and thus did my soul entice me."

Footnotes

850 i.e., a hoof-print in the sand left by the angel Gabriel's horse.

851 Into the fire upon the melted ornaments in order to form the calf.