Deuteronomy 22:2

And if thy brother be not near to thee, or if thou do not know him, then thou shall bring it home to thy house, and it shall be with thee until thy brother seeks after it, and thou shall restore it to him.

Matthew 7:12

All things therefore, as many as ye may want that men should do to you, so also do ye to them, for this is the law and the prophets.

1 Thessalonians 4:6

not to transgress and to cheat his brother in the affair, because the Lord is vengeful about all these things, as also we forewarned you and solemnly testified.

Treasury of Scripture Knowledge

Summary

And if thy brother be not nigh unto thee, or if thou know him not, then thou shalt bring it unto thine own house, and it shall be with thee until thy brother seek after it, and thou shalt restore it to him again.

Thou shalt restore

General references

Bible References

Thou shalt restore

Matthew 7:12
All things therefore, as many as ye may want that men should do to you, so also do ye to them, for this is the law and the prophets.
1 Thessalonians 4:6
not to transgress and to cheat his brother in the affair, because the Lord is vengeful about all these things, as also we forewarned you and solemnly testified.

General references

Exodus 23:4
If thou meet thine enemy's ox or his donkey going astray, thou shall surely bring it back to him again.