Luke
Luke 15:7BSB·traditional attribution

I tell you that in the same way there will be more joy in heaven over one sinner who repents than over ninety-nine righteous ones who do not need to repent.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The diligent attendance of the publicans and sinners upon Christ's ministry. Great multitudes of Jews went with him (Luk 14:25), with such an assurance of admission into the kingdom of God that he found it requisite to say that to them which would shake their vain hopes.

Commenting on Luke 15:1-10

John Gill Reformed Baptist @doctorgill

I say unto you, that likewise joy shall be heaven,.... In the church below, and among the members of it; which is sometimes called heaven, especially in the book of the Revelations; or in heaven above, and among the angels there; see Luk 15:10 Over one sinner that repenteth; for the joy in heaven, is not over sinners as such; for as such, they are...

Albert Barnes Presbyterian @notesbybarnes

Verse 7. Likewise joy, &c. It is a principle of human nature that the recovery of an object in danger of being lost, affords much more intense joy than the quiet possession of many that are safe. This our Saviour illustrated by the case of the lost sheep and of the piece of silver. It might also be illustrated by many other things.