In the Old Testament people blessed other people, or God blessed other people, or people even blessed God in
Gen. 24/27 for example.
Many scriptures of the Old Testament say that Abraham and all his
off-springs will be blessed (e.g. in
Gen. 12/3), it is both a fact and a promise, because what
we finally received by Jesus' death and resurrection is our salvation, is our
blessing out of grace
Gal 3/14 and
Gal 3/9.,
As far as I know there are only 2 scriptures in the New Testament that tell about blessing others:
1) Adults blessing adults in
Matt. 5/44 where we shall bless those who curse us (probably as they are yet not blessed..)
2) adults blessing children in
Marc 10/16 where Jesus blessed little children (and did not baptize them, as still some might think)
The story of Melchisedec blessing Abraham mentioned in the New Testament is only a reflection on what was told in the Old Testament.
Besides that, there are lots of well-wishes from apostle to apostle, from holy to holy one, but no blessings.
We all mostly end our e-mails, mail, encounters with a "God bless you", in all countries and languages - but is it biblical?
Eph 1/3
Blessed be the God and Father of our
Lord Jesus Christ, who hath blessed us with all spiritual blessings in
heavenly places in Christ: