Muhammad says that the Maghrib prayer should be performed at Muzdalifah, (other than this I do not know anything else).

Hazrat Sakan bin Mughira narrates that Hazrat Salim led us in the Maghrib prayer before we reached Muzdalifah.

Hazrat Mujahid says that perform the Maghrib prayer only in Muzdalifah; however, if you lose your way or your mount leads you astray (causes you to go off the path), then you may perform it on the way.

Hazrat Ibn Jurayj says that I asked Hazrat Ata, "What is your opinion if I perform the Maghrib and Isha prayers on the way?" He replied, "There is no harm." I asked, "What is your opinion if I perform the Maghrib prayer on the way and the Isha prayer in Muzdalifah?" He replied, "There is no harm."

Hazrat Umar bin Abdul Aziz was standing at Arafah and saying: O people! You have come from near and far, indeed you are not in one delegation (group). Among you, the one who goes ahead (takes precedence) is not the one whose mount and camel have taken him forward, rather the one who takes precedence is he whose sins Allah Almighty has forgiven. A person asked in a loud voice, "Where should we offer the Maghrib prayer?" He replied, "Offer it in whichever valley you find the time for Maghrib."

When Hazrat Urwah would depart from Arafat towards Muzdalifah, he would sometimes perform the Maghrib prayer on the mountain along the way.

Hasan disliked performing the Maghrib prayer before reaching Muzdalifah, and if someone performed it earlier, then the prayer would be considered fulfilled on his behalf.

Hazrat Tawus disliked performing prayer before Muzdalifah except out of necessity.

Hazrat Usama bin Zaid narrates that I set out from Arafat with the Noble Prophet (peace and blessings be upon him). When we reached on the way, I submitted, "Prayer?" The Prophet (peace and blessings be upon him) said, "Prayer is ahead of you (we will offer it further ahead)."

Hazrat Umar performed Maghrib and Isha in Mina.