"The guarding care that the under-shepherd will give the lambs of his flock is well illustrated by a picture I have seen representing the Good Shepherd. The shepherd is leading the way, while the flock follow close behind. Carried in his arms is a helpless lamb, while the mother walks trustingly by his side. Of the work of Christ, Isaiah says, “He shall gather the lambs with His arm, and carry them in His bosom.” [ Isaiah 40:11 .] The lambs need more than daily food. They need protection, and must constantly be guarded with tender care. If one goes astray, it must be searched for. The figure is a beautiful one, and well represents the loving service that the under-shepherd of the flock of Christ is to give to those under his protection and care. GW 211.3"
"He shall feed his flock like a shepherd: he shall gather the lambs with his arm, and carry them in his bosom, and shall gently lead those that are with young."
Ellen White directly references Isaiah 40:11 in this passage.