Jabir said that when God’s messenger intended to perform the pilgrimage he made proclamation among the people and they assembled. Then when he came to al-Baida’ (a place near Dhul Hulaifa) he put on the <i>ihram</i>. Bukhari transmitted it.

عَنْ جَابِرٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَمَّا أَرَادَ الْحَجَّ أَذَّنَ فِي النَّاسِ فَاجْتَمَعُوا فَلَمَّا أَتَى الْبَيْدَاءَ أَحْرَمَ. رَوَاهُ البُخَارِيّ