John Gill Commentary Psalms 105:24

"And he increased his people greatly, And made them stronger than their adversaries." — Psalms 105:24 (ASV)

And he increased his people greatly
God increased the people of Israel greatly in the land of Egypt; they went down few, and became a populous nation; only sixty six persons, besides Jacob's sons' wives; and when they came out from thence were six hundred thousand footmen; indeed, they increased the more they were afflicted, (Exodus 1:12) . So the people of God in this world sometimes increase in number, and that even amidst the persecutions of their enemies; as the Christians did in the first times of the Gospel under the Roman emperors; and they increase in grace, in every grace, and often the more they are tried and exercised by afflictions.

And made them stronger than their enemies
in their bodies, being more healthy, strong, and robust; and which was seen, observed, and owned by their enemies, (Exodus 1:9) . So saints, being strong in the Lord, and in the power of his might, are a match for their enemies; are stronger than they, and are even more than conquerors through Christ, that has loved them.