Amatul Rahmân Omer:
O you who believe! say not (while addressing the Prophet), `Râ`inâ!´ (listen to us - a word used also for showing disrespect for the person addressed), rather say (an equivocal phrase), `Unzurna!´ (- we beg your attention), and listen to him attentively, (that you stand not in need of any such phrases that have double meanings, one in a good sense, the other in a bad one). Indeed there awaits the disbelievers a grievous punishment.