When Jesus had said these things, He was troubled in spirit, and testified and said, "Most assuredly, I say to you, one of you will betray Me."
John 13:21
Surrounding context
13:20 Most assuredly, I say to you, he who receives whomever I send receives Me; and he who receives Me receives Him who sent Me."
13:21 When Jesus had said these things, He was troubled in spirit, and testified and said, "Most assuredly, I say to you, one of you will betray Me."
13:22 Then the disciples looked at one another, perplexed about whom He spoke.