The following is a list of such passages. It is not an exhaustive list as there are other passages where two of the persons are mentioned, but the presence of the third can be assumed by implication. Having listed these passages, I will look at several which are especially significant. The very fact that so many passages can refer to each of the three persons of the Trinity, with each having a distinctive role in our salvation, is the strongest possible evidence that the Holy Spirit is distinct from God the Father, just as Jesus is distinct from God the Father. You will note that the Spirit descends on Jesus to empower him for his public ministry, while God the Father speaks from heaven.
Baptism signifies our initiation into the divine family.
I will explore some of the implications of this further in Part 2. Note that it includes under a singular name not only the Father, but the Son and the Holy Spirit. In certain ways we are weak, but the Spirit is here to help us. For example, when we don't know what to pray for, the Spirit prays for us in ways that cannot be put into words. All our thoughts are known to God.