How Should the Proclamation of Islam be?

One should be wary of the proclamation of Jāhiliyyah (times of ignorance before Islam), (like saying) O people of so-and-so, O people of so-and-so. No! (Say) O people of Tawhīd! O people of Imān (belief)! They’re all brothers. If war comes, he doesn’t affiliate with and say, O so-and-so, O Qaḥṭāniy (a tribe), O tribe so-and-so, O tribe so-and-so, no. They are one. The Muslims are one. One shouldn’t make proclamations of Jāhiliyyah. And for this reason, when (a man from the time of the Prophet ﷺ) called [for help], “O Muhājirīn (migrants)!” And another (man) said: “O Anṣār (people of Madīnah)!” He (the Prophet ﷺ) said: “do you make the proclamation of the times of Jāhiliyyah while I am amongst you?!” So, what’s obligatory is calling by Islām. “O brothers! O Muslims! O believers!” (It should be) like this when calling for help. So, he urges them to fight in the name of Islām and Imān (faith).