Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tabarani:11288Muḥammad b. ʿAmr b. Khālid al-Ḥarrānī from my father > Mūsá b. Aʿyan > ʿAbd al-Malik b. Abū Sulaymān > ʿAṭāʾ > Ibn ʿAbbās

[Machine] "The Prophet ﷺ only did this to show the polytheists his power, so whoever wanted to do it did, and whoever wanted to leave it did." It means "the sand".  

الطبراني:١١٢٨٨حَدَّثَنَا مُحَمَّدُ بْنُ عَمْرِو بْنِ خَالِدٍ الْحَرَّانِيُّ ثنا أَبِي ثنا مُوسَى بْنُ أَعْيَنَ عَنْ عَبْدِ الْمَلِكِ بْنِ أَبِي سُلَيْمَانَ عَنْ عَطَاءٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

«إِنَّمَا فَعَلَهُ رَسُولُ اللهِ ﷺ لِيُرِيَ الْمُشْرِكِينَ قُوَّتَهُ فَمَنْ شَاءَ فَعَلَهُ وَمَنْ شَاءَ تَرَكَهُ» يَعْنِي الرَّمَلَ