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They say: The second piece of evidence for stipulating the muhallil comes from what Abū Ḥātim Ibn Ḥibbān recorded in his Ṣaḥīḥ ⦗1⦘. He said: “Al-Ḥasan ibn Sufyān narrated to us; Ibrāhīm ibn al-Mundhir narrated to us; ʿAbd Allāh ibn Nāfiʿ narrated from ʿĀṣim, from ʿAbd Allāh ibn Dīnār, from Ibn ʿUmar: ‘The Prophet ﷺ arranged a race between two horses, set a prize between them, and added a muhallil, then said: “No prize-staking is permitted except in a horse, a camel, or an arrow.”’
They continue: Every transmitter in this chain is reliable, and Abū Ḥātim’s grading of this report from ʿĀṣim—namely, ʿĀṣim ibn ʿUmar ibn Ḥafṣ—as authentic shows that he regarded him as trustworthy; the relevance of the narration is self-evident.

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The third proof is what the ḥāfiẓ Abū Isḥāq Yaʿqūb ibn Ibrāhīm al-Saʿdī related in his book al-Mutarjam, where he said: ‘ʿAbd Allāh ibn Yūsuf narrated to us, [and he said]…’