"A time to embrace, and a time to refrain from embracing"
A wheelbarrow - Credit: Cal KT
Izz Huett is quoting from chapter 3 of the biblical book Ecclesiastes. This famous passage states that there is a time for everything. Tess is scandalised by her use of scripture to justify enjoying being carried by Angel Clare (and probably also unsettled by the warm feelings she glimpses in another woman for the man she loves).
In fact, Izz's scripture was by no means the only scandalous thing about this scene for Victorian readers. So shocking was the idea of physical contact between unmarried men and women that when the book first appeared in serial form in The Graphic, Hardy was forced to rewrite the scene so that Angel Clare transports the girls in a wheelbarrow rather than carrying them. Not nearly so romantic.