John Gill Commentary Genesis 29:3

"And thither were all the flocks gathered. And they rolled the stone from the well`s mouth, and watered the sheep, and put the stone again upon the well`s mouth in its place." — Genesis 29:3 (ASV)

And thither were all the flocks gathered
The three above mentioned, (Genesis 29:2) : and they rolled the stone from the well's mouth, and watered the
sheep ;
that is, when they watered the sheep, they used to roll away the stone from the mouth of the well in order to do it; for as yet the flocks, now lying by it, had not been watered, as appears from (Genesis 29:7Genesis 29:8) : and put a stone upon the well's mouth in this place ;
this they were wont to do every time they watered the flocks.