Yesaya 41:13

41:13 For I am the Lord your God,

the one who takes hold of your right hand,

who says to you, ‘Don’t be afraid, I am helping you.’

Yesaya 48:10

48:10 Look, I have refined you, but not as silver;

I have purified you ¹  in the furnace of misery.

[48:10]  ¹ tc The Hebrew text has בְּחַרְתִּיךָ (bÿkhartikha, “I have chosen you”), but the Qumran scroll 1QIsa^a reads correctly בחנתיכה (“I have tested you”). The metallurgical background of the imagery suggests that purification through testing is the idea.