How many minutes should one wait after the adhan to establish the prayer in a mosque where there is no imam?

His saying, "If he saw them gathered, he would hasten [the prayer], and if he saw them tarry, he would delay [it]," indicates considering the conditions of the congregation in bringing forward or delaying the prayer. So, initiating the prayer when the worshipers have gathered is better, and waiting before they gather is permissible. It is mentioned in the Sunnah to delay the Dhuhr prayer when the heat is intense.