The RT host most probably refers to the meeting on investigation into the crash of a Russian airliner over Sinai, held in Kremlin on November, 16.
During the meeting President Putin, among other things, has said:
This is not the first time Russia experiences barbaric terrorist crime, usually without any obvious internal or external causes, the way it was with the explosion at the railway station in Volgograd at the end of 2013. We remember everything and everyone.
The murder of our people over Sinai is one of the bloodiest crimes in terms of the lives it claimed. We will not dry our tears – this will remain forever in our hearts and minds. However, this would not stop us from finding and punishing the perpetrators.
We have to do it without any period of limitation; we need to know all their names. We will search wherever they may be hiding. We will find them anywhere on the planet and punish them.
(official transcript in English, in Russian)
The quote the RT host has tweeted is a slightly modified quote from the 2004's U.S. movie Man On Fire, starring Denzel Washington:
Forgiveness is between them and God. It's my job to arrange the meeting.
The Putin's quote is in plural ("we", not "I"), does not mention death or its euphemisms ("punish", not "send to God"), and does not talk about forgiveness.