Hadith #2553 (Sunan Abi Dawud)
Book: Jihad (Kitab Al-Jihad)
Narrator(s): Masdad bin Masrhad مسدد بن مسرهد بن مسربل, Nafie' نافع مولى ابن عمر, Salim bin 'Abdullah bin 'Umar سالم بن عبد الله بن عمر بن الخطاب, Ubaidullah bin 'Umar bin Hafs عبيد الله بن عمر بن حفص بن عاصم, Umm Habibah bint Abi Sufyan, Yahya bin Sa'id bin Farroukh al-Qatan يحيى بن سعيد بن فروخ القطان
Grade: Hasan

The Messenger of Allah (ﷺ) said: Tie the horses, rub down their forelocks and their buttocks (or he said: Their rumps), and put things on their necks, but do not put bowstrings.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-2553/