The iniquity of my heels - Perhaps עקבי akebai, which we translate my heels, should be considered the contracted plural of עקבים akebim, supplanters. The verse would then read thus: "Wherefore should I fear in the days of evil, though the iniquity of my supplanters should compass me about." The Syriac and Arabic have taken a similar view of the passage: "Why should I fear in the evil day, when the iniquity of my enemies compasses me about." And so Dr. Kennicott translates it.

trust

Psalm 52:7 See, this is the man that made not God his strength; but trusted in the abundance of his riches...

Psalm 62:10 Trust not in oppression, and become not vain in robbery: if riches increase, set not your heart on them.

Job 31:24,25 If I have made gold my hope, or have said to the fine gold, You are my confidence...

Proverbs 10:15 The rich man's wealth is his strong city: the destruction of the poor is their poverty.

Proverbs 23:5 Will you set your eyes on that which is not? for riches certainly make themselves wings; they fly away as an eagle toward heaven.

Mark 10:24 And the disciples were astonished at his words. But Jesus answers again, and said to them, Children...

1 Timothy 6:17 Charge them that are rich in this world, that they be not high minded, nor trust in uncertain riches, but in the living God...

boast

Esther 5:11 And Haman told them of the glory of his riches, and the multitude of his children, and all the things wherein the king had promoted him...

Jeremiah 9:23 Thus said the LORD, Let not the wise man glory in his wisdom, neither let the mighty man glory in his might...

Ezekiel 28:4,5 With your wisdom and with your understanding you have gotten you riches, and have gotten gold and silver into your treasures...

Hosea 12:8 And Ephraim said, Yet I am become rich, I have found me out substance...

Luke 12:19 And I will say to my soul, Soul, you have much goods laid up for many years; take your ease, eat, drink, and be merry.

The Care of the Soul Urged as the one Thing Needful
Luke 10:42 -- "But one thing is needful." It was the amiable character of our blessed Redeemer, that "he went about doing good," this great motive, which animated all his actions, brought him to the house of his friend Lazarus, at Bethany, and directed his behavior there. Though it was a season of recess from public labor, our Lord brought the sentiments and the pious cares of a preacher of righteousness into the parlor of a friend; and there his doctrine dropped as the rain, and distilled as the …
George Whitefield—Selected Sermons of George Whitefield

Some Helps to Mourning
Having removed the obstructions, let me in the last place propound some helps to holy mourning. 1 Set David's prospect continually before you. My sin is ever before me' (Psalm 51:3). David, that he might be a mourner, kept his eye full upon sin. See what sin is, and then tell me if there be not enough in it to draw forth tears. I know not what name to give it bad enough. One calls it the devil's excrement. Sin is a complication of all evils. It is the spirits of mischief distilled. Sin dishonours …
Thomas Watson—The Beatitudes: An Exposition of Matthew 5:1-12

"Boast not Thyself of To-Morrow, for Thou Knowest not what a Day May Bring Forth. "
Prov. xxvii. 1.--"Boast not thyself of to-morrow, for thou knowest not what a day may bring forth." There are some peculiar gifts that God hath given to man in his first creation, and endued his nature with, beyond other living creatures, which being rightly ordered and improved towards the right objects, do advance the soul of man to a wonderful height of happiness, that no other sublunary creature is capable of. But by reason of man's fall into sin, these are quite disordered and turned out of …
Hugh Binning—The Works of the Rev. Hugh Binning