"The journey to Jerusalem, in the simple, patriarchal style, amidst the beauty of the springtime, the richness of midsummer, or the ripened glory of autumn, was a delight. With offerings of gratitude they came, from the man of white hairs to the little child, to meet with God in His holy habitation. As they journeyed, the experiences of the past, the stories that both old and young still love so well, were recounted to the Hebrew children. The songs that had cheered the wilderness wandering were sung. God's commandments were chanted, and, bound up with the blessed influences of nature and of kindly human association, they were forever fixed in the memory of many a child and youth. Ed 42.1"
"I was glad when they said unto me, Let us go into the house of the Lord."
Both passages express joy and anticipation associated with going to the house of the Lord. EGW expands on the experience of the journey and the communal aspect of worship, amplifying the sentiment expressed in the Psalm.
"The ceremonies witnessed at Jerusalem in connection with the paschal service,—the night assembly, the men with their girded loins, shoes on feet, and staff in hand, the hasty meal, the lamb, the unleavened bread, and the bitter herbs, and in the solemn silence the rehearsal of the story of the sprinkled blood, the death-dealing angel, and the grand march from the land of bondage,—all were of a nature to stir the imagination and impress the heart. Ed 42.2"
"And thus shall ye eat it; with your loins girded, your shoes on your feet, and your staff in your hand; and ye shall eat it in haste: it is the Lord’s passover."
EGW directly references and describes the elements of the Passover meal and the Exodus story as outlined in Exodus 12:11. The details provided are consistent with the biblical account.
"The Feast of Tabernacles, or harvest festival, with its offerings from orchard and field, its week's encampment in the leafy booths, its social reunions, the sacred memorial service, and the generous hospitality to God's workers, the Levites of the sanctuary, and to His children, the strangers and the poor, uplifted all minds in gratitude to Him who had crowned the year with His goodness, and whose paths dropped fatness. Ed 42.3"
"Also in the fifteenth day of the seventh month, when ye have gathered in the fruit of the land, ye shall keep a feast unto the Lord seven days: on the first day shall be a sabbath, and on the eighth day shall be a sabbath."
EGW describes the Feast of Tabernacles, including the offerings, encampment, and hospitality, which are all elements described in Leviticus 23:39 and related verses. The connection is direct and clear.
"Thou crownest the year with thy goodness; and thy paths drop fatness."
EGW directly quotes and alludes to Psalm 65:11, using the phrase "crowned the year with His goodness, and whose paths dropped fatness." This is a clear and intentional reference.