Halakhah do Przysłów 19:34

And likewise included in this commandment is not to do the commandments of God, blessed be He, by way of testing, such that a person do a commandment to test whether God, may He be blessed, will reward him in His righteousness; and not from his love of God and his fear of Him. And let it not be difficult to you that which they, may their memory be blessed, said in the first chapter of Tractate Taanit 9a, "'A tithe shall you tithe (te'aser)' (Deuteronomy 14:22)? Take a tithe (asser) so that you will become wealthy (titasher)." As they have already answered it there and said that in all the commandments is it stated, "Do not test," except in this [one] of tithes, as it is stated (Malachi 3:10), "Bring the whole tithe into the storeroom,[...] and test Me now by this, etc." And the reason for this is like the matter that is written (Proverbs 19:17), "He is lending to God, he who is gracious to the poor" - meaning to say that God, may He be blessed, has informed us that it is through our financing the servants of His house with tithes that purpose and blessing is found in our money, no matter what, and [that] no matter of sin or iniquity will impinge on it. And the reason for the prohibition of testing about the commandments is because the reward for the commandments is not in this world; and as they expounded in Tractate Avodah Zarah 3a, "Today is the day to do them, but tomorrow" - meaning the world to come - "is [the day] to take their reward." And [about] that which they, may their memory be blessed said (Bava Batra 10b), "One who says, 'This coin is for charity in order that my son should live,' behold, he is completely righteous" - the wise commentators have answered [that it is when he decides in his heart to give it whether [his son] lives or does not live, as this is not testing God.

It is from the roots of the commandment [that] since Israel are called the children of the Omnipresent, He, may He be blessed, wanted to discipline them for their sins, so that they return to Him and, in the end, merit the world that is completely good - and like the matter that is written (Proverbs 19:18), "Discipline your son while there is still hope, and do not set your heart on his destruction." And based on this principle, they, may their memory be blessed, said (Makkot 22b) that we estimate [the strength of] the one liable for lashes, such that he not die from the wound of the lashes. And they would lash him according to that which they appraised him that he can withstand from the flogging and not die. And even after they estimated him and started flogging him - if they saw they he is not able to withstand the estimate that they estimated about him, they leave him; as we say in the chapter [entitled] Elu Hen HaLokin in Tractate Makkot 22b, "[If] he is partially flogged and they saw that he is not fit to take that which they estimated about him, he is exempt."