Sunan Abi Dawud Book 15, Hadith 106

Qatadah said “Taking another horse behind one’s horse to urge it on and taking another horse at one’s side are (done) in a horse race.

Previous Hadith

The Prophet (ﷺ) said: There must be no shouting or leading another horse at one's side. Yahya added in his tradition: When racing for a wager.

Sunan Abi Dawud Book 15, Hadith 105
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The pommel of the sword of the Messenger of Allah (ﷺ) was of silver.

Sunan Abi Dawud Book 15, Hadith 107