Deuteronomy 31:6 Be strong and of a good courage, fear not, nor be afraid of them: for the Lord thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee.
John 10:28-29 And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand. My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father’s hand.
Job 11:18 And thou shalt be secure, because there is hope; yea, thou shalt dig about thee, and thou shalt take thy rest in safety.
2 Corinthians 1:22 Who hath also sealed us, and given the earnest of the Spirit in our hearts.
Ephesians 1:13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,
Philippians 1:6 Being confident of this very thing, that he which hath begun a good work in you will perform it until the day of Jesus Christ:
Psalm 9:10 And they that know thy name will put their trust in thee: for thou, Lord, hast not forsaken them that seek thee.
Psalm 37:28a For the Lord loveth judgment, and forsaketh not his saints; they are preserved for ever:
2 Corinthians 4:8-9 We are troubled on every side, yet not distressed; we are perplexed, but not in despair; Persecuted, but not forsaken; cast down, but not destroyed;
Hebrews 13:5 Let your conversation be without covetousness; and be content with such things as ye have: for he hath said, I will never leave thee, nor forsake thee.
These are some of the many passages that show we have security in Christ. Know it, believe it, rest securely in His love, grace, mercies and faithfulness.