A Commentary, Critical, Practical, and Explanatory on the Old and New Testaments, by Robert Jamieson, A.R. Fausset and David Brown  at sacred-texts.com
psa 116:1The writer celebrates the deliverance from extreme perils by which he was favored, and pledges grateful and pious public acknowledgments. (Psa. 116:1-19)
A truly grateful love will be evinced by acts of worship, which calling on God expresses (Psa 116:13; Psa 55:16; Psa 86:7; compare Psa 17:6; Psa 31:2).
psa 116:3For similar figures for distress see Psa 18:4-5.
gat hold upon me--Another sense ("found") of the same word follows, as we speak of disease finding us, and of our finding or catching disease.
psa 116:5The relief which he asked is the result not of his merit, but of God's known pity and tenderness, which is acknowledged in assuring himself (his "soul," Psa 11:1; Psa 16:10) of rest and peace. All calamities [Psa 116:8] are represented by death, tears, and falling of the feet (Psa 56:13).
psa 116:9walk before the Lord--act, or live under His favor and guidance (Gen 17:1; Psa 61:7).
land of the living-- (Psa 27:13).
psa 116:10Confidence in God opposed to distrust of men, as not reliable (Psa 68:8-9). He speaks from an experience of the result of his faith.
psa 116:11in my haste--literally, "terror," or "agitation," produced by his affliction (compare Psa 31:22).
psa 116:12These are modes of expressing acts of worship (compare Psa 116:4; Psa 50:14; Jon 2:9).
psa 116:13the cup of salvation--the drink offering which was part of the thank offering (Num 15:3-5).
psa 116:14now--(compare Psa 115:2). "Oh, that (I may do it)" in the presence, &c.
psa 116:15By the plea of being a homeborn servant, he intimates his claim on God's covenant love to His people.
psa 116:17An ampler declaration of his purpose, designating the place, the Lord's house, or earthly residence in Jerusalem.