Hud pbuh was sent to the people of Aad. They lived in a town called Al-Ahkaf (the hills), which is a situated between hadr-mout and Oman in the Southern part of the Arabian Peninsula.
(And to the people of ’Âd We sent their brother Hûd. He said, “O my people! Worship Allah—you have no other god except Him. Will you not then fear Him?”) [Al-Aaraf 7:65]
(And to the people of ’Âd We sent their brother Hûd. He said, “O my people! Worship Allah. You have no god other than Him. You do nothing but fabricate lies ˹against Allah˺.) [ Hud 11:50]
(And remember the brother of ’Ȃd, when he warned his people, who inhabited the sand-hills) Al-Ahkaf 46:21
ارسل الى قوم اسمهم “عاد.” و كانت تسكن بلدة اسمها “الأحقاف “. و هو بلد يقع بين حضرموت و عمان في جنوب الجزيرة العربية
(وَإِلَىٰ عَادٍ أَخَاهُمْ هُوداً قَالَ يَاقَوْمِ ٱعْبُدُواْ ٱللَّهَ مَا لَكُمْ مِّنْ إِلَـٰهٍ غَيْرُهُ أَفَلاَ تَتَّقُون)
الأعراف 7: 65
(وَإِلَىٰ عَادٍ أَخَاهُمْ هُوداً قَالَ يٰقَوْمِ ٱعْبُدُواْ ٱللَّهَ مَا لَكُمْ مِّنْ إِلَـٰهٍ غَيْرُهُ إِنْ أَنتُمْ إِلاَّ مُفْتَرُون )
هود 11: 50
(اذْكُرْ أَخَا عَادٍ إِذْ أَنذَرَ قَوْمَهُ بِالْأَحْقَافِ)
الأحقاف 46 : 21