These spinners seem to be influenced by certain emotions because they tremble while they spin. They come to the spinning yard at early morning for personal gain (or evolution). Says Sayed, even Allah is moved by their worship and He solicits it. Their yarn was directly accepted. It was never weighted.
Note: This verse means that the true believers always fear Allah and their prayers are influenced by that emotion. This fear is blended with love for Allah. They are very disciplined and they attend their prayers before time. They also attend early dawn prayers. It is such person whom Allah is keen to befriend.
And they invoke their Lord in fear and hope But Allah is the friend of the righteous .(19, Al-Jathiyah)

Some such attachment spinners have, that they tremble while they spin,
To get their gain at dawn they come to the spinning yard,
For such fine yarn even the connoisseur longs,
such spinners' yarn was accepted without weighing it.

Passion of the spinning girls is a strange that they spin and tremble,
Hoping for profit they come in the spinning yard early,
Even connoisseurs long to see their beauty ,
Their fibers were accepted without being put on scales.