"Lord, who may abide in Your tabernacle?
Who may dwell in Your holy hill?" Psalm 15:1

"In whose eyes a reprobate is despised,
But who honors those who fear the Lord;
He swears to his own hurt, and does not change." Vs. 4

Continuing our look into Psalm 15, verse 4b says:
'But who honors those who fear the Lord'
The one who may abide in the tabernacle and dwell in God's holy hill is one who honors others who fear (revere and worships) the Lord. As we see in the following:
The Apostle Paul on his departure from Malta after the Lord was mightily manifested, "They also honored us in many ways; and when we departed, they provided such things as were necessary." Acts 28:10 (Read the whole account Vs. 1-10)

Paul to the Philippians on his sending Epaphroditus to them, "Receive him therefore in the Lord with all gladness, and hold such men in esteem." Philippians 2:29  (Read the whole account Vs. 25-29)

On holy living, Paul tells the Thessalonians, "But we request of you, brethren, that you appreciate those who diligently labor among you, and have charge over you in the Lord and give you instruction, And that you esteem them very highly in love because of their work..." 1 Thessalonians 5:12-13

Verse 4 goes on to say, 'He swears to his own hurt, and does not change'
Other translations from "THE WORD, The Bible of 26 Translations":
"...He keeps to his oath, though he may lose by it." James Moffatt "...and is true come what may, to his pledged word." Ronald Knox "...One who will keep a promise, even to his own detriment, and will not retract." Psalms for Today --R. K. Harrison "...who stands by his pledge at any cost." The Jerusalem Bible

Vows are sacred and are to be kept. Be very cautious about making a vow and keeping it -- however, it is wise to heed Jesus' word concerning vows.
See His admonition at the end of today's greeting.

Of vows/oaths, Scripture tells us:
"If a man vows a vow to the Lord, or swears an oath to bind himself by some agreement, he shall not break his word; he shall do according to all that proceeds out of his mouth." Numbers 30:2

"When you make a vow to the Lords your God, you shall not delay to pay it; for the Lord your God will surely require it of you, it would be a sin to you." Deuteronomy 23:21

"When you make a vow to God, do not delay to pay it; for He has no pleasure in fools. Pay what you have vowed." Ecclesiastes 5:4 Verse 5 goes on to say, "It is better not to vow than to vow and not pay."

Jesus in the Sermon on the Mount tells us, "Again, you have heard that the ancients, were told, 'You shall not make false vows, but shall fulfill your vows to the Lord.'
But I say to you, make no oath at all, either by heaven, for it is the throne of God, Or by the earth, for it is the footstool of His feet, or by Jerusalem, for it is the city of the great King.
Nor shall you make an oath by your head, for you cannot make one hair white or black.
But let your statement be, 'Yes, yes' or 'No, no'; and anything beyond these is of evil." Matthew 5:33-37

Thank you Lord for making Your heart known to Your own. Holy Spirit, lead and guide us so that we may be all for which God has apprehended us.
Amen