Luke 17:15-16
And one of them, when he saw that he was healed, returned, and with a loud voice glorified God, and fell down on his face at His feet, giving Him thanks. And he was a Samaritan.

I always thought it was interesting that Luke points out one leper was a Samaritan.
Samaritans were not loved nor tolerated by the Jews. It makes me wonder how many of the ten lepers were Jewish. It seems likely a few of them were. It also seems that people tolerate others in the same situation.
Perhaps this one Samaritan returned to thank Jesus because he heard how Christ had ministered in Samaria.
Perhaps the others were more interested in getting Lawful approval of their healing and cleansing so they could return to normal life.
Regardless, Jesus asked him, “Were there not ten cleansed? But where are the nine? Were there not any found who returned to give glory to God except this foreigner?” Luke 17:17-18
It’s a great lesson for each of us to take time to thank God for His blessings!