وَعَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا قَالَ: كُنْتُ خَلْفَ رَسُولِ اللَّهِ ﷺ يَوْمًا، فَقَالَ: «يَا غُلَامُ! احْفَظِ اللَّهَ يَحْفَظْكَ، احْفَظِ اللَّهَ تَجِدْهُ تُجَاهَكَ».
Translation: Ibn Abbas reported that one day he was behind the Messenger of Allah ﷺ. He said: “Young boy, be mindful of Allah's commands and Allah will protect you; be mindful of Allah and you will find His help before you.”
احْفَظِ اللَّهَ cannot mean that Allah needs protection. It means to observe Allah's limits, duties and rights. تَجِدْهُ تُجَاهَكَ points to awareness of Allah's help and care, not any notion of physical embodiment.
This is the beginning of one extended piece of counsel continued in the next passages.