Bara bin Malik used to chant to drive the camels of the men, while Anjashah chanted to drive the camels of the women. Anjashah had a beautiful voice, and when he chanted the camels quickened their pace. So the Messenger of Allah ﷺ said, "Anjashah, gently with the glass vessels."
حدثنا أبو كامل وعفان حدثنا حماد عن ثابت
أن البراء بن مالك كان يحدو بالرجال وأنجشة يحدو بالنساء وكان حسن الصوت فحدا فأعنقت الإبل فقال رسول الله ﷺ يا أنجشة رويدا سوقك بالقوارير
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Its isnad is sahih. It was mentioned previously at 13576. His saying, "the camels trotted swiftly," means they moved at a fast pace, and the anaq is the widest stride in walking.