"wisely among entire strangers? Remembering the words of Abraham, that God would send His angel with him, he prayed earnestly for positive guidance. In the family of his master he was accustomed to the constant exercise of kindness and hospitality, and he now asked that an act of courtesy might indicate the maiden whom God had chosen. PP 172.1"
"And he said, O Lord God of my master Abraham, I pray thee, send me good speed this day, and shew kindness unto my master Abraham. Behold, I stand here by the well of water; and the daughters of the men of the city come out to draw water: And let it come to pass, that the damsel to whom I shall say, Let down thy pitcher, I pray thee, that I may drink; and she shall say, Drink, and I will give thy camels drink also: let the same be she that thou hast appointed for thy servant Isaac; and thereby shall I know that thou hast shewed kindness unto my master."
EGW directly references the story and prayer of Abraham's servant seeking a wife for Isaac, echoing the request for a sign of kindness from the chosen maiden.