Deuteronomy 25:15

15 Thou shalt have a just weight and true, and an even bushel and true shall be to thee, that thou live in much time on the land which thy Lord God shall give to thee. (Thou shalt have true and just weights, and there shall be a true and just bushel with thee, so that thou can live a long time on the land which the Lord thy God shall give thee.)

Deuteronomy 25:15 Meaning and Commentary

Deuteronomy 25:15

[But] thou shall have a perfect and just weight, a perfect and
just measure shall thou have
That is, full weights, and full measures; and such as are alike, and everywhere used, according to the standard of the country; (See Gill on Leviticus 19:36);

that thy days may be lengthened in the land which the Lord thy God
giveth thee;
long life was always reckoned a blessing, and is frequently promised to, obedience, and particularly long life in the land of Canaan; which was a most delightful and fruitful land, and which a man might wish to live long in; deceitful men, are threatened with not living half their days, and such may they be said to be that use false weights and measures, ( Psalms 55:23 ) .

Deuteronomy 25:15 In-Context

13 Thou shalt not have in thy bag diverse weights, a greater to buy with, and a less(er) to sell with,

14 neither a bushel more and a (bushel) less shall be in thine house. (nor shall a larger bushel and a smaller bushel be in thy house.)

15 Thou shalt have a just weight and true, and an even bushel and true shall be to thee, that thou live in much time on the land which thy Lord God shall give to thee. (Thou shalt have true and just weights, and there shall be a true and just bushel with thee, so that thou can live a long time on the land which the Lord thy God shall give thee.)

16 For the Lord shall have him abominable that doeth these things, and he loatheth, either curseth, all unrightfulness.

17 Have mind what things Amalek did to thee in the way (Remember what the Amalekites did to thee on the way), when thou wentest out of Egypt;