Deutéronome 18:16

According to all that you begged before the Lord your God in Horeb on the day of the assembling of the tribes to receive the law, saying, Let us not again hear the Great Voice {of the Word - Dibbura} from before the Lord our God, nor behold again that great fire, lest we die:

TO ALL THAT THOU DIDST DESIRE etc. Scripture here did not mention the full request that the people had made [at Sinai], since by their saying Let me not hear again the voice of the Eternal — they would not have merited [the granting of] prophets. But when they said [to Moses], Go thou near, and hear all that the Eternal our G-d may say; and thou shalt speak unto us all that the Eternal our G-d may speak unto thee; and we will hear it, and do it — then they undertook upon themselves to believe in His prophets and to hear and to do whatever G-d would command through them. Therefore he said here, A prophet will the Eternal thy G-d raise up unto thee, of thy brethren, like unto me, and you will believe in him just as you believe in me, for you requested that G-d’s words with you should be through me and that you would hearken to me. If so, believe in the rest of the prophets who come after me, as well, for I and they are identical. This is the sense of [the words of G-d to Moses], “They have well said all that they have spoken — to believe in My prophets, and so will I do for them throughout their generations.” It is possible that their request [at Sinai] was for future generations and their stated consent to hear from Moses — in saying, and thou shalt speak unto us … and we will hear it, and do it — was also for everlasting generations, and the meaning of the word ‘v’ath’ (and thou) is “you and every prohpet of G-d like you,” as I have explained it there.