"And the Lord says, “If thou turn away thy foot from the Sabbath, from doing thy pleasure on My holy day; and call the Sabbath a delight, the holy of the Lord, honorable; ... then shalt thou delight thyself in the Lord.” Isaiah 58:13, 14 . To all who receive the Sabbath as a sign of Christ's creative and redeeming power, it will be a delight. Seeing Christ in it, they delight themselves in Him. The Sabbath points them to the works of creation as an evidence of His mighty power in redemption. While it calls to mind the lost peace of Eden, it tells of peace restored through the Saviour. And every object in nature repeats His invitation, “Come unto Me, all ye that labor and are heavy-laden, and I will give you rest.” Matthew 11:28 . DA 289.1"
"If thou turn away thy foot from the sabbath, from doing thy pleasure on my holy day; and call the sabbath a delight, the holy of the Lord, honourable; and shalt honour him, not doing thine own ways, nor finding thine own pleasure, nor speaking thine own words:"
The EGW passage directly quotes Isaiah 58:13 and connects it to the meaning and observance of the Sabbath. This is a clear and direct allusion.
"Then shalt thou delight thyself in the Lord; and I will cause thee to ride upon the high places of the earth, and feed thee with the heritage of Jacob thy father: for the mouth of the Lord hath spoken it."
EGW directly quotes and interprets Isaiah 58:13-14, making a clear connection between Sabbath observance and delighting in the Lord.
"Come unto me, all ye that labour and are heavy laden, and I will give you rest."
Ellen White directly references Matthew 11:28 in this passage.