If only they had been satisfied with what Allāh and His Messenger gave them and said, "Sufficient for us is Allāh; Allāh will give us of His bounty, and [so will] His Messenger; indeed, we are desirous toward Allāh," [it would have been better for them].
Hypocrites question the Integrity of the Messenger when distributing Alms
Allah said next,
وَمِنْهُمُ
(And of them), among the hypocrites,
مَّن يَلْمِزُكَ
(who accuse you) or question your integrity,
فِى
(concerning), division of,
الصَّدَقَـتِ
(the alms), when you divide them. They question your fairness, even though it is they who deserve that their integrity be questioned. The hypocrites do not do this in defense of the religion, but to gain more for themselves. This is why,
Mentioned in the previous verses were bad morals and bad deeds of the hypocrites. The same subject continues in the verses quoted above. As for the statement in verse 55 -- where it has been declared that the wealth and children of hypocrites should not be taken as a blessing for them as these are, in fact, a form of punishment from Allah -- it has a reason. Is it not that love for and engrossment in worldly life becomes a punishment right here in this world? One starts with desires to acquire worldly wealth, then goes through a series of hard work to establish the necessary channels, day in and day out, sacrificing sleep, comfort and family life. After that, if one succeeds, come the concerns of increasing and retaining it - a round the clock punishment indeed. A serious loss or sickness could become unwelcome cans of worries, and if one happens to get everything one wants, the vicious circle continues either through apprehensions of decreasing wealth or cravings of increasing it further. There is just no respite anytime.
If a man basks in the glories of wealth and has many minions constantly in attendance, the general public will envy him. But the fact is that such people are the most unlucky. Their condition is such that their wealth and status become fetters, rendering them unable to proceed fully towards God’s religion; they forget God and busy themselves with worldly affairs until they meet with death, which mercilessly divests them of their wealth and high position.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.