They were pleased to do so, in fact, they are obligated to them (autōn | αὐτῶν | gen pl masc3rd); for if the Gentiles have come to share in their (autōn | αὐτῶν | gen pl masc3rd) spiritual blessings, they ought also to be of service to (autois | αὐτοῖς | dat pl masc3rd) them (autois | αὐτοῖς | dat pl masc3rd) in material things.
Reference
Romans 15:27
Sequence
2903