Deuteronomy 10:20
17 For the Lord your God is God of gods and Lord of lords, the great, mighty, and awesome God who is unbiased and takes no bribe, 18 who justly treats the orphan and widow, and who loves resident foreigners, giving them food and clothing. 19 So you must love the resident foreigner because you were foreigners in the land of Egypt. 20 Revere the Lord your God, serve him, be loyal to him, and take oaths only in his name. 21 He is the one you should praise; he is your God, the one who has done these great and awesome things for you that you have seen.
Colossians 3:24
23 Whatever you are doing, work at it with enthusiasm, as to the Lord and not for people, 24 because you know that you will receive your inheritance from the Lord as the reward. Serve the Lord Christ. 25 For the one who does wrong will be repaid for his wrong, and there are no exceptions.
Notes and References
"... Colossians contains no explicit quotations and few allusions to the Old Testament. The most distinct Old Testament echoes occur in Colossians 3. The claim that Christ is “ seated at the right hand of God ” (3:1) clearly alludes to Psalm 110:1, the most frequent intertext in the New Testament (see, e.g., Hay 1973). Additionally, talk of a new nature's “being renewed in knowledge according to the image of its creator” in 3:10 is “an unavoidable allusion to Genesis 1:26f.” (Wolter 1993:180). Furthermore, the call for slaves to fear the Lord (3:22) and the assertion that there is no partiality (with God [3:25]) cohere with Old Testament texts such as Deuteronomy 10:20, Proverbs 1:7; 3:7, and Ecclesiastes 5:7 in the first instance (compare Sirach 1:11–30; 2:7–9) and Deuteronomy 10:17 in the second (compare Sirach 35:15). Interestingly, 2 Chronicles 19:7 conjoins fear of the Lord on the one hand with the Lord's impartiality on the other ..."
Martin, Troy W. and Todd D. Still "Colossians" in Aune, David Edward, (ed.) The Blackwell Companion to the New Testament (p. 495) Wiley-Blackwell, 2010