From Nidah 70b, Soncino translation and notes:
What must a man do that he may become rich? He replied: Let him engage much in business34 and deal honestly. Did not many, they said to him, do so but it was of no avail to them? — Rather, let him pray for mercy from Him to whom are the riches, for it is said, Mine is the silver, and Mine the gold.35 What then36 does he 37teach us?38 — That one without the other39 does not suffice.
(34) ‘Engage . . . business’ is deleted by Elijah Wilna.
(35) Hag. II, 8.
(36) Seeing that one has in any case to pray for mercy.
(37) Samuel who stated, ‘Let him engage much’ etc.
(38) Cf. prev. n. but five mut. mut.
(39) Honest dealing without prayer and vice versa.