While we often read in the New Testament of people believing on the Lord Jesus Christ, and then being baptised, we never read of anyone who is still an unbeliever being baptised. Examples of places where it is stated that people believed first, and then were baptised, are the Ethiopian who was baptised by Philip, and the Philippian jailer:
“36 Now as they went down the road, they came to some water. And the eunuch said, “See, here is water. What hinders me from being baptized?” 37 Then Philip said, “If you believe with all your heart, you may.” And he answered and said, “I believe that Jesus Christ is the Son of God.”” (Ac 8:36-37 NKJV)
“31 So they said, “Believe on the Lord Jesus Christ, and you will be saved, you and your household.” 32 Then they spoke the word of the Lord to him and to all who were in his house. 33 And he took them the same hour of the night and washed [their] stripes. And immediately he and all his [family] were baptized. 34 Now when he had brought them into his house, he set food before them; and he rejoiced, having believed in God with all his household.” (Ac 16:31-34 NKJV)
No I didn't forget the thief. In fact I wrote in Post 3 of this thread, the very post to which you were replying: "Baptism is a sign that one has been saved. It is not necessary in order to be saved. We have only to think of the thief on the cross, to whom Jesus said, Today you will be with me in paradise." Like the people in Auschwitz and Dachau, he had no opportunity for baptism." As for baptism not being available while Jesus was bodily on earth, we read in John 4:
“1 ¶ Therefore, when the Lord knew that the Pharisees had heard that Jesus made and baptized more disciples than John 2 (though Jesus Himself did not baptize, but His disciples),” (Joh 4:1-2 NKJV)