If you MUST continuously REASSURE someone of their SALVATION...are/were they LIVING in REPENTANCE? This is why FAITH without WORKS is DEAD. They are on LIFE SUPPORT. That's UNBELIEF, it means they are/were not DOING what they are/were SUPPOSED to be DOING. (James 2:14-26).
Trusting that JESUS CHRIST's GRACE is SUFFICIENT and WALKING as HE WALKED in the NEW LIFE. They are still LIVING in a LIE. SHOW them HOW.
"Therefore let us leave the ELEMENTARY doctrine of Christ and go on to maturity, not laying again a foundation of repentance from dead works and of faith toward God, and of instruction about washings, the laying on of hands, the resurrection of the dead, and eternal judgment. And this we will do if God permits." (Hebrews 6:1-3)
"Study and do your best to present yourself to God approved, a workman [tested by trial] who has no reason to be ashamed, accurately handling and skillfully teaching the word of truth. But avoid all irreverent babble and godless chatter [with its profane, empty words], for it will lead to further ungodliness, and their teaching will spread like gangrene. So it is with Hymenaeus and Philetus, who have deviated from the truth. They claim that the resurrection has already taken place, and they undermine the faith of some. Nevertheless, the firm foundation of God [which He has laid] stands [sure and unshaken despite attacks], bearing this seal: “The Lord knows those who are His,” and, “Let everyone who names the name of the Lord stand apart from wickedness and withdraw from wrongdoing.” 2 Timothy 2:15-19
"Enter through the narrow gate. For wide is the gate and broad and easy to travel is the path that leads the way to destruction and eternal loss, and there are many who enter through it. But small is the gate and narrow and difficult to travel is the path that leads the way to [everlasting] life, and there are few who find it." (Matthew 7:13-14)
"“Not everyone who says to Me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only he who does the will of My Father who is in heaven. Many will say to Me on that day [when I judge them], ‘Lord, Lord, have we not prophesied in Your name, and driven out demons in Your name, and done many miracles in Your name?’ And then I will declare to them publicly, ‘I never knew you; depart from Me [you are banished from My presence], you who act wickedly [disregarding My commands].’" (Matthew 7:21-23)
"Pursue peace with all men, as well as HOLINESS, without which no one will see the Lord. Be careful that no one falls short of the grace of God, so that no root of bitterness will spring up to cause trouble and defile many. See to it that no one is sexually immoral, or is godless like Esau, who sold his birthright for a single meal. For you know that afterward, when he wanted to inherit the blessing, he was rejected. He could find no ground for repentance, though he sought the blessing with tears." (Hebrews 12:14-17)