'You’re nearly 3, you should toughen up a bit,' Delilah O’Donoghue tells younger brother, Gabriel.

A 4-year-old’s sisterly advice to “toughen up” was a loving lesson for her  younger brother — and has struck a chord with online viewers.

The video, uploaded to YouTube last Tuesday, shows Delilah O’Donoghue, of  the village of Balsall Common, England, sitting on a bench with her younger  brother, Gabriel.

Delilah informs the 2-year-old why it’s important to listen to their  parents, not spit and refrain from fights with older boys.

“You’re not old enough for that boy to ... do a fight,” the girl advises. “That boy’s older than you. Maybe he’s 9 or 10 ... or maybe 8.”

She urges him to, “Think about it, Gabriel. Think about it.”

Her other pearls of wisdom include:

“You’re nearly 3, you should toughen up a bit,” and, “When mum and dad said  you don’t do that, you don’t do that ... and you don’t spit.”

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