"Lexical backing"? Is that what we are going with? "Lexical backing"? Seriously?
No, there is no "proof" that he received the indwelling in Acts 2:4. It says that everyone there had the Spirit poured "on" them, not into their hearts. Joseph had the Spirit of God (Gen 41:38), Bezalel was filled with the Spirit of God (Exo 31:3), Joshua had the Spirit of God (Num 27:18), Othniel was filled with the Spirit of God (Judges 3:10), Jephthah was filled with the Spirit of God (Judges 11:29), David had the Spirit of God (1 Sam 16:13)(and there are many more), but they did not have the indwelling, because the indwelling was not given until after Jesus was glorified (John 7:39).
Just to have the Spirit of God does not indicate the indwelling.
Actually the reception does.
How is it the Jews knew the gentiles had faith, repentance unto life, and had their hearts purified and were candidates for water baptism
Acts 10:45–47 (ESV) — 45 And the believers from among the circumcised who had come with Peter were amazed, because the gift of the Holy Spirit was poured out even on the Gentiles. 46 For they were hearing them speaking in tongues and extolling God. Then Peter declared, 47 “
Can anyone withhold water for baptizing these people, who have received the Holy Spirit just as we have?”
Acts 11:15–18 (ESV) — 15 As I began to speak, the Holy Spirit fell on them just as on us at the beginning. 16 And I remembered the word of the Lord, how he said, ‘John baptized with water, but you will be baptized with the Holy Spirit.’ 17 If then God gave the same gift to them as he gave to us when we believed in the Lord Jesus Christ, who was I that I could stand in God’s way?” 18 When they heard these things they fell silent. And they glorified God, saying, “
Then to the Gentiles also God has granted repentance that leads to life.”
Acts 15:6–9 (ESV) — 6 The apostles and the elders were gathered together to consider this matter. 7 And after there had been much debate, Peter stood up and said to them, “Brothers, you know that in the early days God made a choice among you, that by my mouth the Gentiles should hear the word of the gospel and believe. 8 And God, who knows the heart, bore witness to them, by giving them the Holy Spirit just as he did to us, 9
and he made no distinction between us and them, having cleansed their hearts by faith.
where do you read those things are witnessed by a speaking in tongues?
How does reception of a lesser gift (your view) show worthiness to receive a greater gift?