John 6:36-39

36But as I told you, you have seen me and still you do not believe. 37All those the Father gives me will come to me, and whoever comes to me I will never drive away. 38For I have come down from heaven not to do my will but to do the will of him who sent me. 39And this is the will of him who sent me, that I shall lose none of all those he has given me, but raise them up at the last day.