Luke 1:69.
God has His times and seasons. Actually there were a few Gentiles that received salvation in the Old Testament. Rahab in the Book of Joshua was one and Ruth in the Book of Ruth was another. There were more, but this was the exception to the rule. During Jesus' time on earth more Gentiles are mentioned and then finally when the Jewish people rejected Jesus as the Messiah it was time for the Gentile to be accepted by God on a different basis, although Salvation has always come by faith in God, God created a time when mostly Gentiles could come to Him freely and in great numbers. Salvation to the Gentiles was mentioned in the Old Testament a number of times, but the timing was God's.
In the King James Version, the first time the word house is mentioned is in Genesis 7:1.
The word "Heaven" is mentioned 266 times in the Old Testament.
Word Christianity was mentioned in the Old Testament the exact number of times that it was mentioned in the New Testament - zero.
259
No, Peter is not mentioned in the Old Testament, because he was not born yet at that time.
The first mention of the term Christian is mentioned in the New Testament in the book of Acts. There it is mentioned that Antioch was the first place where the term was used. The Apostles called themselves the followers of The Way.
twice
Approximately 180 times
Once, in Isaiah 8:16.
King James Bible - Redemption - 20. 9 time in Old Testament and 11 in the New Testament
Muhammed is not mentioned in the Bible as he comes after the time of the Bible. Jesus, however, is mentioned in the Bible, specifically in the New Testament but also mentioned in the Old, though not as 'Jesus'.