When the Messenger of Allah (ﷺ) would go out (for prayer) on the day of 'Id, he ordered to bring a lance, it was then setup in front of him and he would pray in its direction, and the people (stood) behind him. He used to do so during journey ; hence the rulers would take it (lance with them).
Reference: Sunan Abi Dawud 687 In-book : Book 2, Hadith 297 English translation : Book 2, Hadith 687
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