Deuteronomy 15:5

5 And if ye shall indeed hearken to the voice of the Lord your God, to keep and do all these commandments, as many as I charge thee this day,

Deuteronomy 15:5 Meaning and Commentary

Ver. 5 Only if thou carefully hearken to the voice of the Lord thy God,
&c.] In his word, and by his prophets; this being the case, there would be no more poor among them, or however they would be so blessed of God, that they would be capable of releasing the debts of the poor, without hurting themselves and their families:

to observe to do all these commandments which I command thee this day;
a phrase often used to put them in mind of the commands of God, and the necessity of keeping them, their temporal happiness depending thereon.

Deuteronomy 15:5 In-Context

3 Of a stranger thou shalt ask again whatsoever he has of thine, but to thy brother thou shalt remit his debt to thee.
4 For there shall not be a poor person in the midst of thee, for the Lord thy God will surely bless thee in the land which the Lord thy God gives thee by inheritance, that thou shouldest inherit it.
5 And if ye shall indeed hearken to the voice of the Lord your God, to keep and do all these commandments, as many as I charge thee this day,
6 (for the Lord thy God has blessed thee in the way of which he spoke to thee,) then thou shalt lend to many nations, but thou shalt not borrow; and thou shalt rule over many nations, but they shall not rule over thee.
7 And if there shall be in the midst of thee a poor of thy brethren in one of thy cities in the land, which the Lord thy God gives thee, thou shalt not harden thine heart, neither shalt thou by any means close up thine hand from thy brother who is in want.

The Brenton translation of the Septuagint is in the public domain.