(See endnotes for their sources in previous canon media)
The first batch is from the episode’s opening. The voices are all those of Force-users, and are distinct and do not overlap with each other. Ezra hears them as he is in the portal and just after he emerges. I don’t know of a high quality clip of this online, or I would link it.
YODA: Truly wonderful the mind of a child is. [1]
OBI WAN: What is this place?
QUI GON: A conduit through which the entire Force of the universe flows. [2]YODA: Luminous beings are we, not this crude matter. [3]
AHSOKA: Just when you think you understand the Force, you find out how little you actually know. [4]
YODA: Train yourself to let go of everything you fear to lose. [5]
OBI WAN: What you need, you already have. Unfortunately, you seem to be letting it all go. [6]KANAN: I won’t let him lose his way, not like I did. [7]
OBI WAN: The Force is what gives a Jedi his power. It’s an energy field created by all living things. It surrounds us and penetrates us. It binds the galaxy together. [8]
The second batch happens later after we cut back to Ezra from the others. These voices are not exclusively those of Force-users. They are more whisper-y, and overlap a lot.
@pixelrey posted a quality clip of this segment.
YODA: Rejoice for those around you who transform into the Force… [9]
MAZ: I see it in your eyes, you already know the truth… [10]
CHIRRUT: I’m one with the Force, the Force is with me… [11]
JYN: …the time to fight is now! [12]
KYLO/BEN: Show me… [13]
REY: We’ll see each other again… [14]
KYLO/BEN: …Grandfather… [15]
REY: …I believe that [16]
THE FATHER: And now you see who you truly are! [17]
KYLO/BEN: …Show me… [18]
ANAKIN: I cant lose you, Padme! [19]KYLO/BEN: …and I will finish what you started. [20]
POE: …will not be intimidated by you [21]THE DAUGHTER: …it is his nature! [22]
MAZ: The belonging you seek is not behind you… [23]
LEIA: This is our most desperate hour… [24]
YODA: …the shadow of greed, that is. [25]
LEIA: …help me, Obi Wan Kenobi, you’re my only hope. [26]
*more here from a male speaker, probably YODA; made indistinct by Morai the Convoree’s hooting to Ezra*
ANAKIN: You never would have made it as Obi Wan’s apprentice, but you might make it as mine. [27]
Hopefully there’s some helpful context here!
(Sources below the cut)