"talebearer, the surmiser of evil! He is a stranger to true happiness. 5T 176.2"
"A talebearer revealeth secrets: but he that is of a faithful spirit concealeth the matter."
Both passages discuss the negative consequences of being a talebearer.
"“Blessed are the peacemakers.” Grace and peace rest upon those who refuse to join in the strife of tongues. When vendors of scandal are passing from family to family, those who fear God will be chaste keepers at home. The time that is so often worse than wasted in idle, frivolous, and malicious gossip should be given to higher and nobler objects. If our brethren and sisters would become missionaries for God, visiting the sick and afflicted, and laboring patiently and kindly for the erring,—in short, if they would copy the Pattern,—the church would have prosperity in all her borders. 5T 176.3"
"Blessed are the peacemakers: for they shall be called the children of God."
The EGW passage directly quotes Matthew 5:9 and expands on the concept of peacemaking.
"For he that will love life, and see good days, let him refrain his tongue from evil, and his lips that they speak no guile:"
Both passages discuss refraining from evil speech and its positive consequences. While not a direct quote, the theme of controlling the tongue and avoiding gossip connects the two.