Non Buddhist can say Hello to Buddha or Monk? I understand this hand sign is to respect and say hello to Buddha or greeting to monks.
Ques 1: Where is this written in Sutta exactly what the hand sign means?
Ques 2: Can non Buddhist bow to Buddha when they visit temple? Most articles says no.
If no, then what other hand sign more standard or more acceptable widely to greet Buddha or Monk from Buddhism perspective?
Post note: Buddha is not for Worship
Then the monks, delighting in &amp; approving of the Blessed One's words, rose from their seats and — bowing down to the Blessed One and circumambulating him, keeping him to their right — went to Ven. Sariputta. On arrival, they exchanged courteous greetings with him. After an exchange of friendly greetings &amp; courtesies, they sat to one side.
https://www.accesstoinsight.org/tipitaka/sn/sn22/sn22.002.than.html
Perhaps it was a very old tradition to respect the elders and worthy people or even people with power.