"Those who go forth as ministers have a solemn responsibility devolving upon them, which is strangely neglected. Some enjoy preaching, but they do not give personal labor to the churches. There is great need of instruction concerning obligations and duties to God, especially in regard to paying an honest tithe. Our ministers would feel sadly aggrieved if they were not promptly paid for their labor; but will they consider that there must be meat in the treasure-house of God wherewith to sustain the laborers? If they fail to do their whole duty in educating the people to be faithful in paying to God His own, there will be a shortage of means in the treasury to carry forward the Lord's work. GW 228.1"
"Let the elders that rule well be counted worthy of double honour, especially they who labour in the word and doctrine."
Both passages discuss the support of ministers. 1 Timothy 5:17 speaks of honoring those who labor in word and doctrine, while EGW discusses the need to provide for ministers through tithes. The connection is thematic, focusing on the financial support of those in ministry.
"The overseer of the flock of God should faithfully discharge his duty. If he takes the position that, because this is not pleasant to him, he will leave it for some one else to do, he is not a faithful worker. Let him read in Malachi the words of the Lord charging the people with robbery toward God in withholding the tithes. The mighty God declares, “Ye are cursed with a curse.” [ Malachi 3:9 ] When the one who ministers in word and doctrine sees the people pursuing a course that will bring this curse upon them, how can he neglect his duty to give them instruction and warning? Every church-member should be taught to be faithful in paying an honest tithe.— Testimonies for the Church 9:246-251 . GW 228.2"
"Ye are cursed with a curse: for ye have robbed me, even this whole nation."
EGW directly quotes Malachi 3:9, linking the curse to the act of robbing God through withheld tithes.
"Will a man rob God? Yet ye have robbed me. But ye say, Wherein have we robbed thee? In tithes and offerings."
EGW directly quotes and references Malachi 3:9, connecting the withholding of tithes with a curse.