Acts 2. It is clear that this was the moment when the apostles were baptised in the Spirit (Acts 1:5). As noted in part 1 ('With, In & Upon') the experience was some time after their new birth. (Incidentally, it is not recorded when the disciples were baptised in water, or by whom). There was a sound of a mighty wind, tongues of fire appeared on them and they praised God in tongues (vv.1-12).
However, Peter tells the people that if they repent and are baptised they
too will receive the gift of the Holy Spirit. He presents salvation,
water baptism and baptism in the Spirit as a total package; and the
people respond. They are baptised that same day; and there is no mention
of any delay in their being baptised in the Holy Spirit (vv.38-42).