The Bible. You must have me on ignore still because I gave a section of scripture just a few posts back that discusses this very issue. Here it is again.
John 6
37 All those the Father gives me will come to me, and whoever comes to me I will never drive away.
38 For I have come down from heaven not to do my will but to do the will of him who sent me.
39 And 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.
ALL those the Father gives me (Jesus) will come to me