And David girded his sword upon his armor, and he attempted to go; for he had not tried it. And David said unto Saul, I cannot go with these; for I have not tried them. And David put them off him.
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George Leo Haydock
Armour. Hebrew, "he tried to go. "Symmachus, "he went lame. "Septuagint, "he laboured in walking once and twice. "(Calmet)
Salien supposes that the armour was not made for Saul, as he was much more bulky than young David. Yet we find that the latter could use the sword of the giant without difficulty. (St. Chrysostom) (Haydock)