Strong's numbers

רֵיקָם (H7387)

rêyqâm

ray-kawm'

from רֵיק; emptily; figuratively (objective) ineffectually, (subjective) undeservedly; without cause, empty, in vain, void.

רֵיקָם adv. emptily, vainly

1 in empty condition, empty = with empty hands

2 in vain, without effect

From Brown, Driver, and Briggs, A Hebrew and English Lexicon of the Old Testament (1906), in the public domain.

Shown in the King James Version (KJV), whichever translation you read in — it is the text these numbers are tagged against.

Job 22:9
Thou hast sent widows away empty, and the arms of the fatherless have been broken.
Psalms 7:4
If I have rewarded evil unto him that was at peace with me;(yea, I have delivered him that without cause is mine enemy:)
Psalms 25:3
Yea, let none that wait on thee be ashamed: let them be ashamed which transgress without cause.
Isaiah 55:11
So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it.
Jeremiah 14:3
And their nobles have sent their little ones to the waters: they came to the pits, and found no water; they returned with their vessels empty; they were ashamed and confounded, and covered their heads.
Jeremiah 50:9
For, lo, I will raise and cause to come up against Babylon an assembly of great nations from the north country: and they shall set themselves in array against her; from thence she shall be taken: their arrows shall be as of a mighty expert man; none shall return in vain.