Is Iftar time for the people who fast at sunset or at the time that redness of the east disappears?

The time of Iftar is the time of sunset, which is the beginning of the night and the time of the Maghrib prayer, as God has said: ﴿ثُمَّ أَتِمُّوا الصِّيَامَ إِلَى اللَّيْلِ﴾[1]; “Then complete the fast until the night” and therefore, delaying it until the time that redness of the east disappears does not have any reason, rather such practice has been attributed to Shia exaggerators such as the Khattabiyyah; as one of our companions informed us and said: «صَلَّی الْمَنْصُورُ صَلاةَ الْمَغْرِبِ، ثُمَّ سَمِعَ أَذاناً، فَقالَ: ما هَذَا؟! قُلْنا: هَذَا أَذانُ الشِّیعَةِ! لا یُؤَذِّنُونَ حَتَّى یَرْتَفِعَ اللَّیْلُ! فَقالَ: غَلَبَ عَلَیْهِمُ الْخَطّابِیَّةُ!»[2]; “Mansoor finished the Maghrib prayer, then he heard an Adhan, so he said: what is this?! We said: this is Adhan of Shia! They do not call Adhan until the night comes up! So he said: the Khattabiyyah has dominated them!” and it has been narrated from the Prophet peace be upon him and his family that he said: «لا يَزالُ النّاسُ بِخَيْرٍ ما عَجَّلُوا الْفِطْرَ»[3]; “People are always in blessings as long as they hasten to Iftar” and in another narration it has been said: «عَجِّلُوا الْفِطْرَ فَإِنَّ الْيَهُودَ يُؤَخِّرُونَ»[4]; “Hasten in Iftar; because the Jews delay” and it has been narrated from Abu Atiyyah that he said: «دَخَلْتُ أَنَا وَمَسْرُوقٌ عَلَى عَائِشَةَ، فَقُلْنَا: يَا أُمَّ الْمُؤْمِنِينَ! رَجُلَانِ مِنْ أَصْحَابِ مُحَمَّدٍ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ، أَحَدُهُمَا يُعَجِّلُ الْإِفْطَارَ وَيُعَجِّلُ الصَّلَاةَ، وَالآخَرُ يُؤَخِّرُ الْإِفْطَارَ وَيُؤَخِّرُ الصَّلَاةَ، قَالَتْ: أَيُّهُمَا الَّذِي يُعَجِّلُ الْإِفْطَارَ وَيُعَجِّلُ الصَّلَاةَ؟ قَالَ: قُلْنَا: عَبْدُ اللَّهِ يَعْنِي ابْنَ مَسْعُودٍ، قَالَتْ: كَذَلِكَ كَانَ يَصْنَعُ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ -زاد أبو كُريب:- وَالآخَرُ أَبُو مُوسَى»[5]; “I came to Aisha with Masruq, so we said: Oh mother of believers! There are two men from the companions of Muhammad peace be upon him and his family, one hastens to Iftar and prayer and the other one delays Iftar and prayer, she said: which of them hastens to Iftar and prayer? We said: Abdullah, means Ibn Masoud, she said: the Messenger of God peace be upon him and his family used to do the same. Abu Kurib has added: the other one (who used to delay Iftar and prayer) was Abu Musa Ash’ari”.