Of all the types of translation errors that can be made, missing one of the names or titles of God is most disturbing to me. In this case, God is the Rock. In Hebrew, tzur - the Septuagint translation drops that term and uses something like God or Mighty One.
But Peter and Paul both evidently knew the name, i.e. that God is the Rock:
For who [is] God, save the LORD? and who [is] a rock, save our God? 2 Sam 22:32
Therefore whosoever heareth these sayings of mine, and doeth them, I will liken him unto a wise man, which built his house upon a rock: - Matt 7:4
Moreover, brethren, I would not that ye should be ignorant, how that all our fathers were under the cloud, and all passed through the sea; And were all baptized unto Moses in the cloud and in the sea; And did all eat the same spiritual meat; And did all drink the same spiritual drink: for they drank of that spiritual Rock that followed them: and that Rock was Christ. 1 Cor 10:1-4
Unto you therefore which believe [he is] precious: but unto them which be disobedient, the stone which the builders disallowed, the same is made the head of the corner, And a stone of stumbling, and a rock of offence, [even to them] which stumble at the word, being disobedient: whereunto also they were appointed. 1 Peter 2:7-8
The title itself illuminates the following passage, i.e. God is the Rock!:
Apparently, it wasn't disturbing enough for the Apostles, A-G, for they used the Septuagint (LXX).
I am not sure what wonderful combinations one can come up with by adding different accent marks, but one thing is for sure: whatever was written in the Septuagint was before Christ, and therefore cannot be accused of bias with respect to Him, unless you can show that dropping tzur is a latter-day corruption.
That is correct: "God (Gr. Theos, vs. the Heb. HaTzur, 'The Rock'), His works are true, and all His ways are equity. God is trustworthy, and there is no injustice in Him; just and sacred is the LORD" (Deu. 32:4, LXX).
A similar mistranslation occurs in 2 Sa. 22:32, this time replacing Tzur with Ktistes, altering, "Who is a Rock except our God?" to "Who is a Creator like our God?"
Good catch, A-G.