He used to walk in front of the funeral procession, and the Messenger of Allah ﷺ, Abu Bakr and Umar, and Uthman would all walk in front of it.
حدثنا حجاج قال قرأت على ابن جريج حدثني زياد بن سعد أن ابن شهاب قال حدثني سالم
أنه كان يمشي بين يدي الجنازة وقد كان رسول الله ﷺ وأبو بكر وعمر وعثمان رضي الله عنهم يمشون أمامها
Its isnad is sahih. It is a repetition of the previous hadith in meaning, and a repetition of 4940 with this same isnad, but its wording was not given there, and it was referred back to the one before it, 4939, while here its wording is given in full.