You KNOW it ain't there, but the ECF SURELY said so in Acts 15: the Letter to the Gentiles...
Eucharistia: thankful for; literally the giving of thanks for Gods' grace.
It is used 15 times.
Acts 24:3
1 Cor 14:16
2 Cor 4:15; 9:11-12
Eph 5:4
Phil 4:6
Col 2:7; 4:2
1 Thes 3:9
1 Tim 2:1; 4:3-4
Rev 4:9; 7:12
Notice where it is NOT used.