A thread of bible verses to encourage someone:

Trust in the LORD with all your heart and lean not on your own understanding; in all your ways submit to him, and he will make your paths straight.

Proverbs 3:5-6

For the Spirit God gave us does not make us timid, but gives us power, love and self-discipline.

2 Timothy 1:7

You will keep in perfect peace those whose minds are steadfast, because they trust in you.

Isaiah 26:3

My comfort in my suffering is this: Your promise preserves my life.

Psalm 119:50

Cast your cares on the LORD and he will sustain you; he will never let the righteous be shaken.

Psalm 55:22

And we know that in all things God works for the good of those who love him, who have been called according to his purpose. Romans 8:28

May the God of hope fill you with all joy and peace in believing, so that by the power of the Holy Spirit you may abound in hope.

Romans 15:13

Therefore do not be anxious about tomorrow, for tomorrow will be anxious for itself. Sufficient for the day is its own trouble.

Matthew 6:34

Do not be anxious about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God. And the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus.

Philippians 4:6-7