Born of water and of the Spirit John 3:5-7
Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. Marvel not that I said unto thee, Ye must be born again.

Knowing the 120 were born of the Spirit on the day of Pentecost and that no one can enter into the Kingdom without a new birth, and aware that His disciples had no commission to baptize until after the Resurrection, where were the disciples born of the Water?
Born of water here is not necessarily referring to baptism, but when considering the context of the surrounding verses would seem to be referring to the natural birth. In other words, We are first born a natural birth and then those who receive the Holy Spirit are born a second time with a spiritual birth. It follows then that every human is born of water, but those who have been born again are not only born of water, but also the Spirit. Not everyone is born again, but only those who are born of the Spirit.

When looking at any verse in the scriptures it is important to consider the context in which it is written. Verse 5 is talking about two births and it is further explained in verse 6 when it says: "That which is born of flesh is flesh; and that which is born of the Spirit is spirit." Again, there are two births mentioned here, not just one. The first birth is a fleshly birth and the second birth a spiritual birth.