"then upon His hearers. In a voice choked by deep anguish of heart and bitter tears He exclaimed, “O Jerusalem, Jerusalem, thou that killest the prophets, and stonest them which are sent unto thee, how often would I have gathered thy children together, even as a hen gathereth her chickens under her wings, and ye would not!” This is the separation struggle. In the lamentation of Christ the very heart of God is pouring itself forth. It is the mysterious farewell of the long-suffering love of the Deity. DA 620.1"
"O Jerusalem, Jerusalem, thou that killest the prophets, and stonest them which are sent unto thee, how often would I have gathered thy children together, even as a hen gathereth her chickens under her wings, and ye would not!"
The EGW passage directly quotes Matthew 23:37, making it a clear and explicit allusion.