“Then Jonathan said to the young man who bore his armor, ‘Come, let us go over to the garrison of these uncircumcised [ungodly men]; it may be that the Lord will work for us. For nothing restrains the Lord from saving by many or by few.’ So his armorbearer said to him, ‘Do all that is in your heart. Go then; here I am with you, according to your heart.’ Then Jonathan said, ‘Very well, let us cross over to these men, and we will show ourselves to them. If they say thus to us, “Wait until we come to you,” then we will stand still in our place and not go up to them. But if they say thus, “Come up to us,” then we will go up. For the Lord has delivered them into our hand, and this will be a sign to us.’ So both of them showed themselves to the garrison of the Philistines. And the Philistines said, ‘Look, the Hebrews are coming out of the holes where they have hidden.’ Then the men of the garrison called to Jonathan and his armorbearer, and said, ‘Come up to us, and we will show [teach] you something.’ Jonathan said to his armorbearer, ‘Come up after me, for the Lord has delivered them into the hand of Israel.’ And Jonathan climbed up on his hands and knees with his armorbearer after him; and they fell before Jonathan. And as he came after him, his armorbearer killed them. That first slaughter which Jonathan and his armorbearer made was about twenty men within about half an acre of land. And there was trembling in the camp, in the field, and among all the people. The garrison and the raiders also trembled; and the earth quaked, so that it was a very great trembling. Now the watchmen of Saul in Gibeah of Benjamin looked, and there was the multitude, melting away; and they went here and there.” 1 Samuel 14:6-16.
Psalm 91 is one of sixteen Psalms that are called Messianic Psalms; they are prophetic Psalms revealing the Messiah (Christ) to come. Psalms 2, 8, and 22 are three that you may know.
All but three of these Messianic psalms are quoted in the New Testament. These three psalms are Psalm 24, 72, and 89. The entire list of sixteen is as follows: Psalm 2, 8, 16, 22, 24, 40, 41, 45, 68, 69, 72, 89, 91, 102, 110, and 118.
“For we have been consumed by Your anger, and by Your wrath we are terrified. You have set our iniquities before You, our secret sins in the light of Your countenance. For all our days have passed away in Your wrath; we finish our years like a sigh. The days of our lives are seventy years; and if by reason of strength they are eighty years, yet their boast is only labor and sorrow; for it is soon cut off, and we fly away.” Psalm 90:7-10.