Charles Spurgeon Commentary Genesis 24:4-5

"But thou shalt go unto my country, and to my kindred, and take a wife for my son Isaac. And the servant said unto him, Peradventure the woman will not be willing to follow me unto this land. Must I needs bring thy son again unto the land from whence thou camest?" — Genesis 24:4-5 (ASV)

The servant was very careful. Those who swear too readily, not knowing what they swear, will before long swear until they do not care what they swear. It is better still for the Christian to remember the word of Christ, Swear not at all, neither by heaven, nor by earth, nor by any other oath.

Doubtless the doctrine of the Saviour is that all oaths of every sort are lawful to the Christian, but if they are ever taken, it should be with deep circumspection and with earnest prayerfulness, so that there is no mistake about the matter.