Ibrahim narrates: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him), Alqamah and al-Aswad (may Allah have mercy on them) prayed without an adhan or an iqamah.
Sufyan (al-Thawri) said: The iqamah of the town sufficed them.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9241