1 Samuel 1:17 - Matthew Poole's English Annotations on the Holy Bible

Go in peace; I recall my censure, and give thee my blessing, and wish thee peace, i.e. a quiet and composed mind, free from whatsoever it is that grieves and oppresses thee; and withal, good success and prosperity in what thou desirest; for peace is a very comprehensive word among the Hebrews. Grant, or will grant; for it may be either a prayer or a prediction, which he might deliver, either from the consideration of God's known goodness and readiness to hear prayers; or he might be directed to say so by a special instinct of God's Spirit, which sometimes was given to the high priests, even when they were wicked, as 1 Thessalonians 11:51, and much more when they were holy men, as Eli was. And some add, that he was a prophet.