Those who said Maghrib has two times

And Imam al-Shafi'i (may Allah Almighty have mercy on him) mentioned it conditional upon the report being established.

The father of Abu Bakr bin Abi Musa al-Ash'ari (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him) that a questioner came to him (peace and blessings be upon him) and asked him about the times of prayer. He (peace and blessings be upon him) gave him no answer. He (peace and blessings be upon him) ordered Sayyiduna Bilal (may Allah be pleased with him), and he called the iqamah for Fajr when the dawn broke, while the people could hardly recognise one another. Then he (peace and blessings be upon him) gave the order and the iqamah for Zuhr was called when the sun had declined, while someone was saying: It is midday; yet he (peace and blessings be upon him) knew better than them. And he (peace and blessings be upon him) gave the order, and he called the iqamah for Asr while the sun was high. Then he (peace and blessings be upon him) gave the order, and he called the iqamah for Maghrib when the sun had set. Then he (peace and blessings be upon him) gave the order, and he called the iqamah for Isha when the redness of twilight had disappeared. Then the next day he (peace and blessings be upon him) delayed Fajr until, when he (peace and blessings be upon him) finished, someone was saying: The sun has risen, or nearly so. Then (he prayed) Zuhr when it was close to Asr. Then he (peace and blessings be upon him) delayed Asr until, when he (peace and blessings be upon him) finished, someone was saying: The sun has turned red. Then he (peace and blessings be upon him) delayed Maghrib until the redness of twilight was about to disappear; then he delayed Isha until it was the first third of the night. Then in the morning he (peace and blessings be upon him) called the questioner and said: "The time of prayer is between these two."

Sulayman bin Buraydah narrates from his father (may Allah be pleased with him) that a man came to the Prophet (peace and blessings be upon him) and asked about the times of prayer. He (peace and blessings be upon him) said: "Pray with us at these two times." When the sun had declined, he (peace and blessings be upon him) ordered Bilal (may Allah be pleased with him), and he called the adhan; then he (peace and blessings be upon him) ordered, and he called the iqamah for Zuhr; then he (peace and blessings be upon him) ordered, and he called the iqamah for Asr while the sun was high, white and clear; then he (peace and blessings be upon him) ordered, and he called the iqamah for Maghrib when the edge of the sun had disappeared; then he (peace and blessings be upon him) ordered, and he called the iqamah for Isha when the redness of twilight had disappeared; then he (peace and blessings be upon him) ordered, and he called the iqamah for Fajr when the dawn had broken. When the next day came, he (peace and blessings be upon him) ordered, and he called the iqamah for Zuhr, and he (peace and blessings be upon him) delayed it until it was thoroughly cool; then he ordered, and he called the iqamah for Asr while the sun was white, and he (peace and blessings be upon him) delayed it beyond what it had been before; and he ordered, and he called the iqamah for Maghrib before the redness of twilight disappeared; and he (peace and blessings be upon him) ordered, and he called the iqamah for Isha when a third of the night had passed; and then he (peace and blessings be upon him) ordered, and he called the iqamah for Fajr, and he prayed it in the light. Then he (peace and blessings be upon him) said: "(This is) the time of your prayer, as you have seen."
Abu Ayyub added in his narration: Then he (peace and blessings be upon him) said: "Where is the one who asked about the time of prayer?" The man said: I am (here), O Messenger of Allah! He (peace and blessings be upon him) said: "The time of your prayer is between what you have seen."
In the 'Ilal of Abu Isa al-Tirmidhi it is reported from al-Bukhari that he said: The hadith of Abu Musa is hasan, and the hadith of al-Thawri from Alqamah bin Marthad from Ibn Buraydah from his father on the prayer times is a hasan hadith.

It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both); Shu'bah (may Allah have mercy on him) said: He (Qatadah) would sometimes narrate it as marfu' and sometimes not. He said: "The time of the Zuhr prayer is as long as Asr has not come; the time of Asr is as long as Maghrib has not come; the time of Maghrib is as long as the redness has not faded; the time of Isha is as long as the night has not reached its middle; and the time of Subh is as long as the sun has not risen."

It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "When you pray Fajr, its time lasts until the first edge of the sun rises; then when you pray Zuhr, its time lasts until Asr arrives; when you pray Asr, its time lasts until the sun turns yellow; when you pray Maghrib, its time lasts until the redness of twilight disappears; and when you pray Isha, its time lasts until the middle of the night."

Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) said: A man asked about the times of prayer, and he (peace and blessings be upon him) said: "Pray with us." He then narrated the hadith, and in it is: Then he prayed Maghrib when the sun had set; and on the second day he said: "Then he prayed Maghrib before the redness of twilight disappeared."