Berean Standard Bible (BSB)
The disciples looked at one another, perplexed as to which of them He meant.
World English Bible (WEB)
The disciples looked at one another, perplexed about whom he spoke.
Strong's King James
Then{G3767} the disciples{G3101} looked{G991}{(G5707)} one on another{G1519}{G240}, doubting{G639}{(G5734)} of{G4012} whom{G5101} he spake{G3004}{(G5719)}.
The F.O.G *
(22) The disciples looked to one another at a loss of who He spoke.
The F.O.G Message *
Young's Literal Translation
the disciples were looking, therefore, one at another, doubting concerning whom he speaketh.