Meeting another Muslim with a cheerful countenance

When one Muslim meets another he should confront him with a smile and
cheerful countenance and physically express his delight in meeting
him. This will entail a fortification of love and affection between
them. Ifyou confront a grieved person with a cheerful countenance, you
might just allay his grief or at least pacify him. A person feels
unrestrained in expressing himself if he is confronted cheerfully
thereby aiding him in fulfilling his needs.
Hadhrat Abu Dhar (رضى الله تعالى عنه) narrates that the Holy Prophet
(صلى الله عليه وسلم) said:
"Don't ever belittle any of your good deeds even though this may be
meeting your brother witha cheerful countenance." [Muslim]
The Holy Prophet (صلى الله عليه وسلم) said:
"When two Muslims meetsand clasp each others hands, their sins are
shed as a tree sheds it's leaves."
Together with a buoyant confrontation, clasping each others hands is
also mustahab (preferable) as this increases mutual love and
affection.
Hadhrat Qatadah (رضى الله تعالى عنه) relates that he enquired of
Hadhrat Anas (رضى الله تعالى عنه) if the companions of the Holy
Prophet (صلى الله عليه وسلم) grasped each others handswhilst meeting.
Hadhrat Anas (رضى الله تعالى عنه) replied: "Yes of course!" [Fathul
Baari]
Hadhrat Baraa (رضى الله تعالى عنه) narrates that the Holy Prophet (صلى
الله عليه وسلم) said:
"When two Muslims meet one another and clasp each others hands, they
are forgiven even before they separate from one another." [Abu Daud]